2 Advanced Linux Sound Architecture - Driver
3 ==========================================
10 To enable ALSA support you need at least to build the kernel with
11 primary sound card support (CONFIG_SOUND). Since ALSA can emulate OSS,
12 you don't have to choose any of the OSS modules.
14 Enable "OSS API emulation" (CONFIG_SND_OSSEMUL) and both OSS mixer and
15 PCM supports if you want to run OSS applications with ALSA.
17 If you want to support the WaveTable functionality on cards such as
18 SB Live! then you need to enable "Sequencer support"
19 (CONFIG_SND_SEQUENCER).
21 To make ALSA debug messages more verbose, enable the "Verbose printk"
22 and "Debug" options. To check for memory leaks, turn on "Debug memory"
23 too. "Debug detection" will add checks for the detection of cards.
25 Please note that all the ALSA ISA drivers support the Linux isapnp API
26 (if the card supports ISA PnP). You don't need to configure the cards
33 This depends on your distribution, but normally you use the /dev/MAKEDEV
34 script to create the necessary device nodes. On some systems you use a
35 script named 'snddevices'.
41 The user can load modules with options. If the module supports more than
42 one card and you have more than one card of the same type then you can
43 specify multiple values for the option separated by commas.
45 Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
50 The core ALSA module. It is used by all ALSA card drivers.
51 It takes the following options which have global effects.
53 major - major number for sound driver
56 - limiting card index for auto-loading (1-8)
58 - For auto-loading more than one card, specify this
59 option together with snd-card-X aliases.
60 slots - Reserve the slot index for the given driver.
61 This option takes multiple strings.
62 See "Module Autoloading Support" section for details.
67 The PCM OSS emulation module.
68 This module takes options which change the mapping of devices.
70 dsp_map - PCM device number maps assigned to the 1st OSS device.
72 adsp_map - PCM device number maps assigned to the 2st OSS device.
75 - Don't block opening busy PCM devices. Default: 1
77 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
78 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
79 to PCM #0 of the card #0.
80 For changing the second or later card, specify the option with
81 commas, such like "dsp_map=0,1".
83 nonblock_open option is used to change the behavior of the PCM
84 regarding opening the device. When this option is non-zero,
85 opening a busy OSS PCM device won't be blocked but return
86 immediately with EAGAIN (just like O_NONBLOCK flag).
91 This module takes options which change the mapping of devices.
92 similar to those of the snd-pcm-oss module.
94 midi_map - MIDI device number maps assigned to the 1st OSS device.
96 amidi_map - MIDI device number maps assigned to the 2st OSS device.
99 Common parameters for top sound card modules
100 --------------------------------------------
102 Each of top level sound card module takes the following options.
104 index - index (slot #) of sound card
105 - Values: 0 through 31 or negative
106 - If nonnegative, assign that index number
107 - if negative, interpret as a bitmask of permissible
108 indices; the first free permitted index is assigned
110 id - card ID (identifier or name)
111 - Can be up to 15 characters long
112 - Default: the card type
113 - A directory by this name is created under /proc/asound/
114 containing information about the card
115 - This ID can be used instead of the index number in
118 - Default: enabled, for PCI and ISA PnP cards
123 Module for AdLib FM cards.
125 port - port # for OPL chip
127 This module supports multiple cards. It does not support autoprobe, so
128 the port must be specified. For actual AdLib FM cards it will be 0x388.
129 Note that this card does not have PCM support and no mixer; only FM
132 Make sure you have "sbiload" from the alsa-tools package available and,
133 after loading the module, find out the assigned ALSA sequencer port
134 number through "sbiload -l". Example output:
136 Port Client name Port name
137 64:0 OPL2 FM synth OPL2 FM Port
139 Load the std.sb and drums.sb patches also supplied by sbiload:
141 sbiload -p 64:0 std.sb drums.sb
143 If you use this driver to drive an OPL3, you can use std.o3 and drums.o3
144 instead. To have the card produce sound, use aplaymidi from alsa-utils:
146 aplaymidi -p 64:0 foo.mid
151 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
153 clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
155 This module supports multiple cards, autoprobe and PnP.
160 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
162 port - port # for AD1848 chip
163 irq - IRQ # for AD1848 chip
164 dma1 - DMA # for AD1848 chip (0,1,3)
166 This module supports multiple cards. It does not support autoprobe
167 thus main port must be specified!!! Other ports are optional.
169 The power-management is supported.
174 Module for Analog Devices AD1889 chips.
176 ac97_quirk - AC'97 workaround for strange hardware
177 See the description of intel8x0 module for details.
179 This module supports multiple cards.
184 Module for ALi M5451 PCI chip.
186 pcm_channels - Number of hardware channels assigned for PCM
187 spdif - Support SPDIF I/O
190 This module supports one chip and autoprobe.
192 The power-management is supported.
197 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
199 This module supports multiple cards, autoprobe and PnP.
201 The power-management is supported.
206 Module for Avance Logic ALS300 and ALS300+
208 This module supports multiple cards.
210 The power-management is supported.
215 Module for sound cards based on Avance Logic ALS4000 PCI chip.
217 joystick_port - port # for legacy joystick support.
218 0 = disabled (default), 1 = auto-detect
220 This module supports multiple cards, autoprobe and PnP.
222 The power-management is supported.
227 Module for ATI IXP 150/200/250/400 AC97 controllers.
229 ac97_clock - AC'97 clock (default = 48000)
230 ac97_quirk - AC'97 workaround for strange hardware
231 See "AC97 Quirk Option" section below.
232 ac97_codec - Workaround to specify which AC'97 codec
233 instead of probing. If this works for you
234 file a bug with your `lspci -vn` output.
236 -1 -- Default behavior.
237 0-2 -- Use the specified codec.
238 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
240 This module supports one card and autoprobe.
242 ATI IXP has two different methods to control SPDIF output. One is
243 over AC-link and another is over the "direct" SPDIF output. The
244 implementation depends on the motherboard, and you'll need to
245 choose the correct one via spdif_aclink module option.
247 The power-management is supported.
249 Module snd-atiixp-modem
250 -----------------------
252 Module for ATI IXP 150/200/250 AC97 modem controllers.
254 This module supports one card and autoprobe.
256 Note: The default index value of this module is -2, i.e. the first
259 The power-management is supported.
261 Module snd-au8810, snd-au8820, snd-au8830
262 -----------------------------------------
264 Module for Aureal Vortex, Vortex2 and Advantage device.
266 pcifix - Control PCI workarounds
267 0 = Disable all workarounds
268 1 = Force the PCI latency of the Aureal card to 0xff
269 2 = Force the Extend PCI#2 Internal Master for Efficient
270 Handling of Dummy Requests on the VIA KT133 AGP Bridge
271 3 = Force both settings
272 255 = Autodetect what is required (default)
274 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
275 EQ, mpu401, gameport. A3D and wavetable support are still in development.
276 Development and reverse engineering work is being coordinated at
277 http://savannah.nongnu.org/projects/openvortex/
278 SPDIF output has a copy of the AC97 codec output, unless you use the
279 "spdif" pcm device, which allows raw data passthru.
280 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
283 Note: Some ALSA mixer applications don't handle the SPDIF sample rate
284 control correctly. If you have problems regarding this, try
285 another ALSA compliant mixer (alsamixer works).
290 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
292 This module supports multiple cards, PnP and autoprobe.
294 The power-management is supported.
299 Module for sound cards based on Aztech AZF3328 PCI chip.
301 joystick - Enable joystick (default off)
303 This module supports multiple cards.
308 Module for video cards based on Bt87x chips.
310 digital_rate - Override the default digital rate (Hz)
311 load_all - Load the driver even if the card model isn't known
313 This module supports multiple cards.
315 Note: The default index value of this module is -2, i.e. the first
321 Module for Creative Audigy LS and SB Live 24bit
323 This module supports multiple cards.
329 Module for sound cards based on C-Media CMI8330 ISA chips.
331 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
333 with isapnp=0, the following options are available:
335 wssport - port # for CMI8330 chip (WSS)
336 wssirq - IRQ # for CMI8330 chip (WSS)
337 wssdma - first DMA # for CMI8330 chip (WSS)
338 sbport - port # for CMI8330 chip (SB16)
339 sbirq - IRQ # for CMI8330 chip (SB16)
340 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
341 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
343 This module supports multiple cards and autoprobe.
345 The power-management is supported.
350 Module for C-Media CMI8338/8738/8768/8770 PCI sound cards.
352 mpu_port - port address of MIDI interface (8338 only):
353 0x300,0x310,0x320,0x330 = legacy port,
354 0 = disable (default)
355 fm_port - port address of OPL-3 FM synthesizer (8x38 only):
357 1 = integrated PCI port (default on 8738),
359 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
361 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
363 This module supports autoprobe and multiple cards.
365 The power-management is supported.
370 Module for sound cards based on CS4231 ISA chips.
372 port - port # for CS4231 chip
373 mpu_port - port # for MPU-401 UART (optional), -1 = disable
374 irq - IRQ # for CS4231 chip
375 mpu_irq - IRQ # for MPU-401 UART
376 dma1 - first DMA # for CS4231 chip
377 dma2 - second DMA # for CS4231 chip
379 This module supports multiple cards. This module does not support autoprobe
380 thus main port must be specified!!! Other ports are optional.
382 The power-management is supported.
387 Module for sound cards based on CS4232/CS4232A ISA chips.
389 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
391 with isapnp=0, the following options are available:
393 port - port # for CS4232 chip (PnP setup - 0x534)
394 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
395 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
396 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
397 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
398 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
399 dma1 - first DMA # for CS4232 chip (0,1,3)
400 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
402 This module supports multiple cards. This module does not support autoprobe
403 (if ISA PnP is not used) thus main port must be specified!!! Other ports are
406 The power-management is supported.
411 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
412 CS4238B/CS4239 ISA chips.
414 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
416 with isapnp=0, the following options are available:
418 port - port # for CS4236 chip (PnP setup - 0x534)
419 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
420 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
421 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
422 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
423 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
424 dma1 - first DMA # for CS4236 chip (0,1,3)
425 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
427 This module supports multiple cards. This module does not support autoprobe
428 (if ISA PnP is not used) thus main port and control port must be
429 specified!!! Other ports are optional.
431 The power-management is supported.
436 Module for Cirrus Logic CS4281 soundchip.
438 dual_codec - Secondary codec ID (0 = disable, default)
440 This module supports multiple cards.
442 The power-management is supported.
447 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
448 CS4624/CS4630/CS4280 PCI chips.
450 external_amp - Force to enable external amplifier.
451 thinkpad - Force to enable Thinkpad's CLKRUN control.
452 mmap_valid - Support OSS mmap mode (default = 0).
454 This module supports multiple cards and autoprobe.
455 Usually external amp and CLKRUN controls are detected automatically
456 from PCI sub vendor/device ids. If they don't work, give the options
459 The power-management is supported.
464 Module for Cyrix/NatSemi Geode 5530 chip.
466 Module snd-cs5535audio
467 ----------------------
469 Module for multifunction CS5535 companion PCI device
471 The power-management is supported.
476 Module for Echoaudio Darla20
478 This module supports multiple cards.
479 The driver requires the firmware loader support on kernel.
484 Module for Echoaudio Darla24
486 This module supports multiple cards.
487 The driver requires the firmware loader support on kernel.
492 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
495 This module supports multiple cards. This module is enabled only with
498 The power-management is supported.
503 Module for the dummy sound card. This "card" doesn't do any output
504 or input, but you may use this module for any application which
505 requires a sound card (like RealPlayer).
507 The power-management is supported.
512 Module for Echoaudio 3G cards (Gina3G/Layla3G)
514 This module supports multiple cards.
515 The driver requires the firmware loader support on kernel.
520 Module for EMU10K1/EMU10k2 based PCI sound cards.
521 * Sound Blaster Live!
522 * Sound Blaster PCI 512
523 * Emu APS (partially supported)
524 * Sound Blaster Audigy
526 extin - bitmap of available external inputs for FX8010 (see bellow)
527 extout - bitmap of available external outputs for FX8010 (see bellow)
528 seq_ports - allocated sequencer ports (4 by default)
529 max_synth_voices - limit of voices used for wavetable (64 by default)
530 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
531 given in MB unit. Default value is 128.
532 enable_ir - enable IR
534 This module supports multiple cards and autoprobe.
536 Input & Output configurations [extin/extout]
537 * Creative Card wo/Digital out [0x0003/0x1f03]
538 * Creative Card w/Digital out [0x0003/0x1f0f]
539 * Creative Card w/Digital CD in [0x000f/0x1f0f]
540 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
541 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
542 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
543 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
544 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
545 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
546 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
547 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
548 * Creative Card all ins and outs [0x3fff/0x7fff]
550 The power-management is supported.
555 Module for Creative Emu10k1X (SB Live Dell OEM version)
557 This module supports multiple cards.
562 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
563 * SoundBlaster PCI 64
564 * SoundBlaster PCI 128
566 joystick - Enable joystick (default off)
568 This module supports multiple cards and autoprobe.
570 The power-management is supported.
575 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
576 * SoundBlaster PCI 64
577 * SoundBlaster PCI 128
578 * SoundBlaster Vibra PCI
580 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
581 0 = disable (default), 1 = auto-detect
583 This module supports multiple cards and autoprobe.
585 The power-management is supported.
590 Module for sound cards based on ESS ES968 chip (PnP only).
592 This module supports multiple cards, PnP and autoprobe.
594 The power-management is supported.
599 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
601 port - port # for ES-1688 chip (0x220,0x240,0x260)
602 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
603 irq - IRQ # for ES-1688 chip (5,7,9,10)
604 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
605 dma8 - DMA # for ES-1688 chip (0,1,3)
607 This module supports multiple cards and autoprobe (without MPU-401 port).
612 Module for ESS AudioDrive ES-18xx sound cards.
614 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
616 with isapnp=0, the following options are available:
618 port - port # for ES-18xx chip (0x220,0x240,0x260)
619 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
620 fm_port - port # for FM (optional, not used)
621 irq - IRQ # for ES-18xx chip (5,7,9,10)
622 dma1 - first DMA # for ES-18xx chip (0,1,3)
623 dma2 - first DMA # for ES-18xx chip (0,1,3)
625 This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
626 port if native ISA PnP routines are not used).
627 When dma2 is equal with dma1, the driver works as half-duplex.
629 The power-management is supported.
634 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
636 This module supports multiple cards and autoprobe.
638 The power-management is supported.
643 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
645 total_bufsize - total buffer size in kB (1-4096kB)
646 pcm_substreams_p - playback channels (1-8, default=2)
647 pcm_substreams_c - capture channels (1-8, default=0)
648 clock - clock (0 = auto-detection)
649 use_pm - support the power-management (0 = off, 1 = on,
651 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
652 joystick - enable joystick (default off)
654 This module supports multiple cards and autoprobe.
656 The power-management is supported.
661 Module for ForteMedia FM801 based PCI sound cards.
663 tea575x_tuner - Enable TEA575x tuner
664 - 1 = MediaForte 256-PCS
665 - 2 = MediaForte 256-PCPR
666 - 3 = MediaForte 64-PCR
667 - High 16-bits are video (radio) device number + 1
668 - example: 0x10002 (MediaForte 256-PCPR, device 1)
670 This module supports multiple cards and autoprobe.
672 The power-management is supported.
677 Module for Echoaudio Gina20
679 This module supports multiple cards.
680 The driver requires the firmware loader support on kernel.
685 Module for Echoaudio Gina24
687 This module supports multiple cards.
688 The driver requires the firmware loader support on kernel.
690 Module snd-gusclassic
691 ---------------------
693 Module for Gravis UltraSound Classic sound card.
695 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
696 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
697 dma1 - DMA # for GF1 chip (1,3,5,6,7)
698 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
699 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
700 voices - GF1 voices limit (14-32)
701 pcm_voices - reserved PCM voices
703 This module supports multiple cards and autoprobe.
705 Module snd-gusextreme
706 ---------------------
708 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
710 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
711 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
712 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
713 irq - IRQ # for ES-1688 chip (5,7,9,10)
714 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
715 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
716 dma8 - DMA # for ES-1688 chip (0,1,3)
717 dma1 - DMA # for GF1 chip (1,3,5,6,7)
718 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
719 voices - GF1 voices limit (14-32)
720 pcm_voices - reserved PCM voices
722 This module supports multiple cards and autoprobe (without MPU-401 port).
727 Module for Gravis UltraSound MAX sound card.
729 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
730 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
731 dma1 - DMA # for GF1 chip (1,3,5,6,7)
732 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
733 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
734 voices - GF1 voices limit (14-32)
735 pcm_voices - reserved PCM voices
737 This module supports multiple cards and autoprobe.
742 Module for Intel HD Audio (ICH6, ICH6M, ESB2, ICH7, ICH8),
743 ATI SB450, SB600, RS600,
747 [Multiple options for each card instance]
748 model - force the model name
749 position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
750 probe_mask - Bitmask to probe codecs (default = -1, meaning all slots)
752 [Single (global) options]
753 single_cmd - Use single immediate commands to communicate with
754 codecs (for debugging only)
755 enable_msi - Enable Message Signaled Interrupt (MSI) (default = off)
756 power_save - Automatic power-saving timtout (in second, 0 =
758 power_save_controller - Reset HD-audio controller in power-saving mode
761 This module supports multiple cards and autoprobe.
763 Each codec may have a model table for different configurations.
764 If your machine isn't listed there, the default (usually minimal)
765 configuration is set up. You can pass "model=<name>" option to
766 specify a certain model in such a case. There are different
767 models depending on the codec chip.
769 Model name Description
770 ---------- -----------
772 3stack 3-jack in back and a headphone out
773 3stack-digout 3-jack in back, a HP out and a SPDIF out
774 5stack 5-jack in back, 2-jack in front
775 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
776 6stack 6-jack in back, 2-jack in front
777 6stack-digout 6-jack with a SPDIF out
779 z71v 3-jack (HP shared SPDIF)
780 asus 3-jack (ASUS Mobo)
782 asus-dig ASUS with SPDIF out
783 asus-dig2 ASUS with SPDIF out (using GPIO2)
785 fujitsu Fujitsu Laptops (Pi1536)
787 lg LG laptop (m1 express dual)
788 lg-lw LG LW20/LW25 laptop
790 clevo Clevo laptops (m520G, m665n)
791 test for testing/debugging purpose, almost all controls can be
792 adjusted. Appearing only when compiled with
794 auto auto-config reading BIOS (default)
798 hp-3013 HP machines (3013-variant)
799 fujitsu Fujitsu S7020
801 will Will laptops (PB V7900)
802 replacer Replacer 672V
803 basic fixed pin assignment (old default model)
804 test for testing/debugging purpose, almost all controls can
805 adjusted. Appearing only when compiled with
807 auto auto-config reading BIOS (default)
810 fujitsu Fujitsu Laptop
811 hp-bpc HP xw4400/6400/8400/9400 laptops
812 hp-bpc-d7000 HP BPC D7000
813 hp-tc-t5735 HP Thin Client T5735
817 hippo Hippo (ATI) with jack detection, Sony UX-90s
818 hippo_1 Hippo (Benq) with jack detection
819 sony-assamd Sony ASSAMD
820 ultra Samsung Q1 Ultra Vista model
821 basic fixed pin assignment w/o SPDIF
822 auto auto-config reading BIOS (default)
828 dell Dell OEM laptops (Vostro 1200)
829 test for testing/debugging purpose, almost all controls can
830 adjusted. Appearing only when compiled with
832 auto auto-config reading BIOS (default)
835 3stack-dig 3-stack (2-channel) with SPDIF
836 3stack-6ch 3-stack (6-channel)
837 3stack-6ch-dig 3-stack (6-channel) with SPDIF
838 6stack-dig 6-stack with SPDIF
839 lenovo-101e Lenovo laptop
840 eeepc-p701 ASUS Eeepc P701
841 eeepc-ep20 ASUS Eeepc EP20
842 auto auto-config reading BIOS (default)
845 3stack-dig 3-jack with SPDIF I/O
846 6stack-dig 6-jack digital with SPDIF I/O
848 targa Targa T8, MSI-1049 T8
851 macpro MacPro support
852 mbp3 Macbook Pro rev3
853 imac24 iMac 24'' with jack detection
855 auto auto-config reading BIOS (default)
858 3stack-dig 3-jack with SPDIF I/O
859 6stack-dig 6-jack digital with SPDIF I/O
860 3stack-6ch 3-jack 6-channel
861 3stack-6ch-dig 3-jack 6-channel with SPDIF I/O
862 6stack-dig-demo 6-jack digital for Intel demo board
863 acer Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
864 acer-aspire Acer Aspire 9810
865 medion Medion Laptops
866 medion-md2 Medion MD2
868 targa-2ch-dig Targs/MSI with 2-channel
869 laptop-eapd 3-jack with SPDIF I/O and EAPD (Clevo M540JE, M550JE)
870 lenovo-101e Lenovo 101E
871 lenovo-nb0763 Lenovo NB0763
872 lenovo-ms7195-dig Lenovo MS7195
874 6stack-hp HP machines with 6stack (Nettle boards)
875 3stack-hp HP machines with 3stack (Lucknow, Samba boards)
876 6stack-dell Dell machines with 6stack (Inspiron 530)
878 auto auto-config reading BIOS (default)
882 3stack-dig 3-jack with SPDIF I/O
883 6stack-dig 6-jack with SPDIF I/O
884 3stack-660 3-jack (for ALC660)
885 uniwill-m31 Uniwill M31 laptop
886 toshiba Toshiba laptop support
887 asus Asus laptop support
888 asus-laptop ASUS F2/F3 laptops
889 auto auto-config reading BIOS (default)
893 3stack-dig 3-jack with SPDIF OUT
894 6stack-dig 6-jack with SPDIF OUT
895 3stack-660 3-jack (for ALC660VD)
896 3stack-660-digout 3-jack with SPDIF OUT (for ALC660VD)
897 lenovo Lenovo 3000 C200
898 dallas Dallas laptops
900 auto auto-config reading BIOS (default)
903 minimal 3-jack in back
904 min_fp 3-jack in back, 2-jack in front
905 full 6-jack in back, 2-jack in front
906 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
907 allout 5-jack in back, 2-jack in front, SPDIF out
908 auto auto-config reading BIOS (default)
911 3stack 3-stack mode (default)
918 basic 3-jack (default)
920 thinkpad Lenovo Thinkpad T60/X60/Z60
927 basic default configuration
928 thinkpad Lenovo Thinkpad T61/X61
931 6stack 6-jack, separate surrounds (default)
932 3stack 3-stack, shared surrounds
933 laptop 2-channel only (FSC V2060, Samsung M50)
934 laptop-eapd 2-channel with EAPD (Samsung R65, ASUS A6J)
935 laptop-automute 2-channel with EAPD and HP-automute (Lenovo N100)
936 ultra 2-channel with EAPD (Samsung Ultra tablet PC)
940 6stack-dig ditto with SPDIF
942 3stack-dig ditto with SPDIF
943 laptop 3-jack with hp-jack automute
944 laptop-dig ditto with SPDIF
945 auto auto-config reading BIOS (default)
948 laptop-hpsense Laptop with HP sense (old model laptop)
949 laptop-micsense Laptop with Mic sense (old model fujitsu)
950 laptop-hpmicsense Laptop with HP and Mic senses
952 test for testing/debugging purpose, almost all controls
953 can be adjusted. Appearing only when compiled with
957 laptop Basic Laptop config
958 laptop-hp Laptop config for some HP models (subdevice 30A5)
959 laptop-eapd Laptop config with EAPD support
960 test for testing/debugging purpose, almost all controls
961 can be adjusted. Appearing only when compiled with
965 laptop Basic Laptop config (default)
970 dell-d21 Dell (unknown)
971 dell-d22 Dell (unknown)
972 dell-d23 Dell (unknown)
973 dell-m21 Dell Inspiron 630m, Dell Inspiron 640m
974 dell-m22 Dell Latitude D620, Dell Latitude D820
975 dell-m23 Dell XPS M1710, Dell Precision M90
976 dell-m24 Dell Latitude 120L
977 dell-m25 Dell Inspiron E1505n
978 dell-m26 Dell Inspiron 1501
979 dell-m27 Dell Inspiron E1705/9400
980 gateway Gateway laptops with EAPD control
984 dell-m42 Dell (unknown)
985 dell-m43 Dell Precision
986 dell-m44 Dell Inspiron
991 5stack D945 5stack + SPDIF
992 intel-mac-v1 Intel Mac Type 1
993 intel-mac-v2 Intel Mac Type 2
994 intel-mac-v3 Intel Mac Type 3
995 intel-mac-v4 Intel Mac Type 4
996 intel-mac-v5 Intel Mac Type 5
997 macmini Intel Mac Mini (equivalent with type 3)
998 macbook Intel Mac Book (eq. type 5)
999 macbook-pro-v1 Intel Mac Book Pro 1st generation (eq. type 3)
1000 macbook-pro Intel Mac Book Pro 2nd generation (eq. type 3)
1001 imac-intel Intel iMac (eq. type 2)
1002 imac-intel-20 Intel iMac (newer version) (eq. type 3)
1003 dell-d81 Dell (unknown)
1004 dell-d82 Dell (unknown)
1005 dell-m81 Dell (unknown)
1006 dell-m82 Dell XPS M1210
1009 ref Reference board, base config
1010 m2-2 Some Gateway MX series laptops
1011 m6 Some Gateway NX series laptops
1012 pa6 Gateway NX860 series
1014 STAC9227/9228/9229/927x
1017 5stack D965 5stack + SPDIF
1018 dell-3stack Dell Dimension E520
1021 vaio Setup for VAIO FE550G/SZ110
1022 vaio-ar Setup for VAIO AR
1024 The model name "genric" is treated as a special case. When this
1025 model is given, the driver uses the generic codec parser without
1026 "codec-patch". It's sometimes good for testing and debugging.
1028 If the default configuration doesn't work and one of the above
1029 matches with your device, report it together with the PCI
1030 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
1031 ML (see the section "Links and Addresses").
1033 power_save and power_save_controller options are for power-saving
1034 mode. See powersave.txt for details.
1036 Note 2: If you get click noises on output, try the module option
1037 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
1038 register value without FIFO size correction as the current
1039 DMA pointer. position_fix=2 will make the driver to use
1040 the position buffer instead of reading SD_LPIB register.
1041 (Usually SD_LPLIB register is more accurate than the
1044 NB: If you get many "azx_get_response timeout" messages at
1045 loading, it's likely a problem of interrupts (e.g. ACPI irq
1046 routing). Try to boot with options like "pci=noacpi". Also, you
1047 can try "single_cmd=1" module option. This will switch the
1048 communication method between HDA controller and codecs to the
1049 single immediate commands instead of CORB/RIRB. Basically, the
1050 single command mode is provided only for BIOS, and you won't get
1051 unsolicited events, too. But, at least, this works independently
1052 from the irq. Remember this is a last resort, and should be
1053 avoided as much as possible...
1055 MORE NOTES ON "azx_get_response timeout" PROBLEMS:
1056 On some hardwares, you may need to add a proper probe_mask option
1057 to avoid the "azx_get_response timeout" problem above, instead.
1058 This occurs when the access to non-existing or non-working codec slot
1059 (likely a modem one) causes a stall of the communication via HD-audio
1060 bus. You can see which codec slots are probed by enabling
1061 CONFIG_SND_DEBUG_DETECT, or simply from the file name of the codec
1062 proc files. Then limit the slots to probe by probe_mask option.
1063 For example, probe_mask=1 means to probe only the first slot, and
1064 probe_mask=4 means only the third slot.
1066 The power-management is supported.
1071 Module for RME Hammerfall DSP audio interface(s)
1073 This module supports multiple cards.
1075 Note: The firmware data can be automatically loaded via hotplug
1076 when CONFIG_FW_LOADER is set. Otherwise, you need to load
1077 the firmware via hdsploader utility included in alsa-tools
1079 The firmware data is found in alsa-firmware package.
1081 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1082 module did formerly. It will allocate the buffers in advance
1083 when any HDSP cards are found. To make the buffer
1084 allocation sure, load snd-page-alloc module in the early
1085 stage of boot sequence. See "Early Buffer Allocation"
1091 Module for RME HDSP MADI board.
1093 precise_ptr - Enable precise pointer, or disable.
1094 line_outs_monitor - Send playback streams to analog outs by default.
1095 enable_monitor - Enable Analog Out on Channel 63/64 by default.
1097 See hdspm.txt for details.
1102 Module for the MediaTek/TempoTec HiFier Fantasia sound card.
1104 This module supports autoprobe and multiple cards.
1106 Power management is _not_ supported.
1111 Module for Envy24 (ICE1712) based PCI sound cards.
1112 * MidiMan M Audio Delta 1010
1113 * MidiMan M Audio Delta 1010LT
1114 * MidiMan M Audio Delta DiO 2496
1115 * MidiMan M Audio Delta 66
1116 * MidiMan M Audio Delta 44
1117 * MidiMan M Audio Delta 410
1118 * MidiMan M Audio Audiophile 2496
1121 * TerraTec EWX 24/96
1122 * TerraTec DMX 6Fire
1124 * Hoontech SoundTrack DSP 24
1125 * Hoontech SoundTrack DSP 24 Value
1126 * Hoontech SoundTrack DSP 24 Media 7.1
1127 * Event Electronics, EZ8
1129 * Lionstracs, Mediastaton
1131 model - Use the given board model, one of the following:
1132 delta1010, dio2496, delta66, delta44, audiophile, delta410,
1133 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
1134 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
1135 phase88, mediastation
1136 omni - Omni I/O support for MidiMan M-Audio Delta44/66
1137 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transceiver)
1138 in msec resolution, default value is 500 (0.5 sec)
1140 This module supports multiple cards and autoprobe. Note: The consumer part
1141 is not used with all Envy24 based cards (for example in the MidiMan Delta
1144 Note: The supported board is detected by reading EEPROM or PCI
1145 SSID (if EEPROM isn't available). You can override the
1146 model by passing "model" module option in case that the
1147 driver isn't configured properly or you want to try another
1153 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
1154 * MidiMan M Audio Revolution 5.1
1155 * MidiMan M Audio Revolution 7.1
1156 * MidiMan M Audio Audiophile 192
1158 * TerraTec Aureon 5.1 Sky
1159 * TerraTec Aureon 7.1 Space
1160 * TerraTec Aureon 7.1 Universe
1163 * AudioTrak Prodigy 7.1
1164 * AudioTrak Prodigy 7.1LT
1165 * AudioTrak Prodigy 192
1167 * Albatron K8X800 Pro II
1168 * Chaintech ZNF3-150
1169 * Chaintech ZNF3-250
1176 model - Use the given board model, one of the following:
1177 revo51, revo71, amp2000, prodigy71, prodigy71lt,
1178 prodigy192, aureon51, aureon71, universe, ap192,
1179 k8x800, phase22, phase28, ms300, av710, se200pci,
1182 This module supports multiple cards and autoprobe.
1184 Note: The supported board is detected by reading EEPROM or PCI
1185 SSID (if EEPROM isn't available). You can override the
1186 model by passing "model" module option in case that the
1187 driver isn't configured properly or you want to try another
1193 Module for Echoaudio Indigo
1195 This module supports multiple cards.
1196 The driver requires the firmware loader support on kernel.
1201 Module for Echoaudio Indigo DJ
1203 This module supports multiple cards.
1204 The driver requires the firmware loader support on kernel.
1209 Module for Echoaudio Indigo IO
1211 This module supports multiple cards.
1212 The driver requires the firmware loader support on kernel.
1217 Module for AC'97 motherboards from Intel and compatibles.
1218 * Intel i810/810E, i815, i820, i830, i84x, MX440
1219 ICH5, ICH6, ICH7, ESB2
1220 * SiS 7012 (SiS 735)
1221 * NVidia NForce, NForce2, NForce3, MCP04, CK804
1223 * AMD AMD768, AMD8111
1226 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1227 ac97_quirk - AC'97 workaround for strange hardware
1228 See "AC97 Quirk Option" section below.
1229 buggy_irq - Enable workaround for buggy interrupts on some
1230 motherboards (default yes on nForce chips,
1232 buggy_semaphore - Enable workaround for hardwares with buggy
1233 semaphores (e.g. on some ASUS laptops)
1235 spdif_aclink - Use S/PDIF over AC-link instead of direct connection
1236 from the controller chip
1237 (0 = off, 1 = on, -1 = default)
1239 This module supports one chip and autoprobe.
1241 Note: the latest driver supports auto-detection of chip clock.
1242 if you still encounter too fast playback, specify the clock
1243 explicitly via the module option "ac97_clock=41194".
1245 Joystick/MIDI ports are not supported by this driver. If your
1246 motherboard has these devices, use the ns558 or snd-mpu401
1247 modules, respectively.
1249 The power-management is supported.
1251 Module snd-intel8x0m
1252 --------------------
1254 Module for Intel ICH (i8x0) chipset MC97 modems.
1255 * Intel i810/810E, i815, i820, i830, i84x, MX440
1257 * SiS 7013 (SiS 735)
1258 * NVidia NForce, NForce2, NForce2s, NForce3
1262 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1264 This module supports one card and autoprobe.
1266 Note: The default index value of this module is -2, i.e. the first
1269 The power-management is supported.
1271 Module snd-interwave
1272 --------------------
1274 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
1275 and other sound cards based on AMD InterWave (tm) chip.
1277 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1278 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1279 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1280 effect - 1 = InterWave effects enable (default 0);
1282 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1284 with isapnp=0, the following options are available:
1286 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1287 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1288 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1289 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1291 This module supports multiple cards, autoprobe and ISA PnP.
1293 Module snd-interwave-stb
1294 ------------------------
1296 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
1297 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
1298 circuit for extended control of bass, treble and master volume.
1300 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1301 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1302 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1303 effect - 1 = InterWave effects enable (default 0);
1305 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1307 with isapnp=0, the following options are available:
1309 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1310 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
1311 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1312 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1313 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1315 This module supports multiple cards, autoprobe and ISA PnP.
1320 Module for Korg 1212 IO PCI card
1322 This module supports multiple cards.
1327 Module for Echoaudio Layla20
1329 This module supports multiple cards.
1330 The driver requires the firmware loader support on kernel.
1335 Module for Echoaudio Layla24
1337 This module supports multiple cards.
1338 The driver requires the firmware loader support on kernel.
1343 Module for Allegro/Maestro3 chips
1345 external_amp - enable external amp (enabled by default)
1346 amp_gpio - GPIO pin number for external amp (0-15) or
1347 -1 for default pin (8 for allegro, 1 for
1350 This module supports autoprobe and multiple chips.
1352 Note: the binding of amplifier is dependent on hardware.
1353 If there is no sound even though all channels are unmuted, try to
1354 specify other gpio connection via amp_gpio option.
1355 For example, a Panasonic notebook might need "amp_gpio=0x0d"
1358 The power-management is supported.
1363 Module for Echoaudio Mia
1365 This module supports multiple cards.
1366 The driver requires the firmware loader support on kernel.
1371 Module for Miro soundcards: miroSOUND PCM 1 pro,
1373 miroSOUND PCM 20 Radio.
1375 port - Port # (0x530,0x604,0xe80,0xf40)
1376 irq - IRQ # (5,7,9,10,11)
1377 dma1 - 1st dma # (0,1,3)
1378 dma2 - 2nd dma # (0,1)
1379 mpu_port - MPU-401 port # (0x300,0x310,0x320,0x330)
1380 mpu_irq - MPU-401 irq # (5,7,9,10)
1381 fm_port - FM Port # (0x388)
1382 wss - enable WSS mode
1383 ide - enable onboard ide support
1388 Module for Digigram miXart8 sound cards.
1390 This module supports multiple cards.
1391 Note: One miXart8 board will be represented as 4 alsa cards.
1392 See MIXART.txt for details.
1394 When the driver is compiled as a module and the hotplug firmware
1395 is supported, the firmware data is loaded via hotplug automatically.
1396 Install the necessary firmware files in alsa-firmware package.
1397 When no hotplug fw loader is available, you need to load the
1398 firmware via mixartloader utility in alsa-tools package.
1403 Module for Echoaudio Mona
1405 This module supports multiple cards.
1406 The driver requires the firmware loader support on kernel.
1411 Module for MPU-401 UART devices.
1413 port - port number or -1 (disable)
1414 irq - IRQ number or -1 (disable)
1415 pnp - PnP detection - 0 = disable, 1 = enable (default)
1417 This module supports multiple devices and PnP.
1422 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
1425 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1426 irq - IRQ # for MTPAV (7,5, default=7)
1427 hwports - number of supported hardware ports, default=8.
1429 Module supports only 1 card. This module has no enable option.
1434 Module for Ego Systems (ESI) Miditerminal 4140
1436 This module supports multiple devices.
1437 Requires parport (CONFIG_PARPORT).
1442 Module for NeoMagic NM256AV/ZX chips
1444 playback_bufsize - max playback frame size in kB (4-128kB)
1445 capture_bufsize - max capture frame size in kB (4-128kB)
1446 force_ac97 - 0 or 1 (disabled by default)
1447 buffer_top - specify buffer top address
1448 use_cache - 0 or 1 (disabled by default)
1449 vaio_hack - alias buffer_top=0x25a800
1450 reset_workaround - enable AC97 RESET workaround for some laptops
1451 reset_workaround2 - enable extended AC97 RESET workaround for some
1454 This module supports one chip and autoprobe.
1456 The power-management is supported.
1458 Note: on some notebooks the buffer address cannot be detected
1459 automatically, or causes hang-up during initialization.
1460 In such a case, specify the buffer top address explicitly via
1461 the buffer_top option.
1463 Sony F250: buffer_top=0x25a800
1464 Sony F270: buffer_top=0x272800
1465 The driver supports only ac97 codec. It's possible to force
1466 to initialize/use ac97 although it's not detected. In such a
1467 case, use force_ac97=1 option - but *NO* guarantee whether it
1470 Note: The NM256 chip can be linked internally with non-AC97
1471 codecs. This driver supports only the AC97 codec, and won't work
1472 with machines with other (most likely CS423x or OPL3SAx) chips,
1473 even though the device is detected in lspci. In such a case, try
1474 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1475 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1476 and proper hardware parameters in the case without ISA PnP.
1478 Note: some laptops need a workaround for AC97 RESET. For the
1479 known hardware like Dell Latitude LS and Sony PCG-F305, this
1480 workaround is enabled automatically. For other laptops with a
1481 hard freeze, you can try reset_workaround=1 option.
1483 Note: Dell Latitude CSx laptops have another problem regarding
1484 AC97 RESET. On these laptops, reset_workaround2 option is
1485 turned on as default. This option is worth to try if the
1486 previous reset_workaround option doesn't help.
1488 Note: This driver is really crappy. It's a porting from the
1489 OSS driver, which is a result of black-magic reverse engineering.
1490 The detection of codec will fail if the driver is loaded *after*
1491 X-server as described above. You might be able to force to load
1492 the module, but it may result in hang-up. Hence, make sure that
1493 you load this module *before* X if you encounter this kind of
1499 Module for Yamaha OPL3-SA2/SA3 sound cards.
1501 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1503 with isapnp=0, the following options are available:
1505 port - control port # for OPL3-SA chip (0x370)
1506 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1507 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1508 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1509 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1510 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1511 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1512 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1514 This module supports multiple cards and ISA PnP. It does not support
1515 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1517 The power-management is supported.
1519 Module snd-opti92x-ad1848
1520 -------------------------
1522 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1523 Module works with OAK Mozart cards as well.
1525 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1527 with isapnp=0, the following options are available:
1529 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1530 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1531 fm_port - port # for OPL3 device (0x388)
1532 irq - IRQ # for WSS chip (5,7,9,10,11)
1533 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1534 dma1 - first DMA # for WSS chip (0,1,3)
1536 This module supports only one card, autoprobe and PnP.
1538 Module snd-opti92x-cs4231
1539 -------------------------
1541 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1543 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1545 with isapnp=0, the following options are available:
1547 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1548 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1549 fm_port - port # for OPL3 device (0x388)
1550 irq - IRQ # for WSS chip (5,7,9,10,11)
1551 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1552 dma1 - first DMA # for WSS chip (0,1,3)
1553 dma2 - second DMA # for WSS chip (0,1,3)
1555 This module supports only one card, autoprobe and PnP.
1560 Module for sound cards based on OPTi 82c93x chips.
1562 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1564 with isapnp=0, the following options are available:
1566 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1567 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1568 fm_port - port # for OPL3 device (0x388)
1569 irq - IRQ # for WSS chip (5,7,9,10,11)
1570 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1571 dma1 - first DMA # for WSS chip (0,1,3)
1572 dma2 - second DMA # for WSS chip (0,1,3)
1574 This module supports only one card, autoprobe and PnP.
1579 Module for sound cards based on the C-Media CMI8788 chip:
1581 * AuzenTech X-Meridian
1583 * Club3D Theatron DTS
1585 * Razer Barracuda AC-1
1588 This module supports autoprobe and multiple cards.
1590 Power management is _not_ supported.
1595 Module for Digigram PCXHR boards
1597 This module supports multiple cards.
1599 Module snd-portman2x4
1600 ---------------------
1602 Module for Midiman Portman 2x4 parallel port MIDI interface
1604 This module supports multiple cards.
1606 Module snd-powermac (on ppc only)
1607 ---------------------------------
1609 Module for PowerMac, iMac and iBook on-board soundchips
1611 enable_beep - enable beep using PCM (enabled as default)
1613 Module supports autoprobe a chip.
1615 Note: the driver may have problems regarding endianess.
1617 The power-management is supported.
1619 Module snd-pxa2xx-ac97 (on arm only)
1620 ------------------------------------
1622 Module for AC97 driver for the Intel PXA2xx chip
1624 For ARM architecture only.
1626 The power-management is supported.
1631 Module for Conexant Riptide chip
1633 joystick_port - Joystick port # (default: 0x200)
1634 mpu_port - MPU401 port # (default: 0x330)
1635 opl3_port - OPL3 port # (default: 0x388)
1637 This module supports multiple cards.
1638 The driver requires the firmware loader support on kernel.
1639 You need to install the firmware file "riptide.hex" to the standard
1640 firmware path (e.g. /lib/firmware).
1645 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1646 Prodif96 and Prodif Gold) sound cards.
1648 This module supports multiple cards.
1653 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1655 This module supports multiple cards.
1660 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1662 precise_ptr - Enable precise pointer (doesn't work reliably).
1665 This module supports multiple cards.
1667 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1668 module did formerly. It will allocate the buffers in advance
1669 when any RME9652 cards are found. To make the buffer
1670 allocation sure, load snd-page-alloc module in the early
1671 stage of boot sequence. See "Early Buffer Allocation"
1674 Module snd-sa11xx-uda1341 (on arm only)
1675 ---------------------------------------
1677 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1679 Module supports only one card.
1680 Module has no enable and index options.
1682 The power-management is supported.
1687 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1691 port - port # for SB DSP chip (0x220,0x240,0x260)
1692 irq - IRQ # for SB DSP chip (5,7,9,10)
1693 dma8 - DMA # for SB DSP chip (1,3)
1695 This module supports multiple cards and autoprobe.
1697 The power-management is supported.
1699 Module snd-sb16 and snd-sbawe
1700 -----------------------------
1702 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1703 SoundBlaster AWE 32 (PnP),
1704 SoundBlaster AWE 64 PnP
1706 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1707 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1708 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1710 with isapnp=0, the following options are available:
1712 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1713 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1714 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1715 (snd-sbawe module only)
1716 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1717 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1718 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1720 This module supports multiple cards, autoprobe and ISA PnP.
1722 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1723 disable 16bit DMA with dma16 = -1 module parameter.
1724 Also, all Sound Blaster 16 type cards can operate in 16-bit
1725 half duplex mode through 8-bit DMA channel by disabling their
1728 The power-management is supported.
1733 Module for Gallant SC-6000 soundcard.
1735 port - Port # (0x220 or 0x240)
1736 mss_port - MSS Port # (0x530 or 0xe80)
1737 irq - IRQ # (5,7,9,10,11)
1738 mpu_irq - MPU-401 IRQ # (5,7,9,10) ,0 - no MPU-401 irq
1741 This module supports multiple cards.
1743 This card is also known as Audio Excel DSP 16 or Zoltrix AV302.
1748 Module for Aztech Sound Galaxy sound card.
1750 sbport - Port # for SB16 interface (0x220,0x240)
1751 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1752 irq - IRQ # (7,9,10,11)
1755 This module supports multiple cards.
1757 The power-management is supported.
1762 Module for ENSONIQ SoundScape PnP cards.
1764 port - Port # (PnP setup)
1765 wss_port - WSS Port # (PnP setup)
1766 irq - IRQ # (PnP setup)
1767 mpu_irq - MPU-401 IRQ # (PnP setup)
1768 dma - DMA # (PnP setup)
1769 dma2 - 2nd DMA # (PnP setup, -1 to disable)
1771 This module supports multiple cards. ISA PnP must be enabled.
1772 You need sscape_ctl tool in alsa-tools package for loading
1775 Module snd-sun-amd7930 (on sparc only)
1776 --------------------------------------
1778 Module for AMD7930 sound chips found on Sparcs.
1780 This module supports multiple cards.
1782 Module snd-sun-cs4231 (on sparc only)
1783 -------------------------------------
1785 Module for CS4231 sound chips found on Sparcs.
1787 This module supports multiple cards.
1789 Module snd-sun-dbri (on sparc only)
1790 -----------------------------------
1792 Module for DBRI sound chips found on Sparcs.
1794 This module supports multiple cards.
1796 Module snd-wavefront
1797 --------------------
1799 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1801 use_cs4232_midi - Use CS4232 MPU-401 interface
1802 (inaccessibly located inside your computer)
1803 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1805 with isapnp=0, the following options are available:
1807 cs4232_pcm_port - Port # for CS4232 PCM interface.
1808 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1809 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1810 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1811 ics2115_port - Port # for ICS2115
1812 ics2115_irq - IRQ # for ICS2115
1813 fm_port - FM OPL-3 Port #
1814 dma1 - DMA1 # for CS4232 PCM interface.
1815 dma2 - DMA2 # for CS4232 PCM interface.
1817 The below are options for wavefront_synth features:
1818 wf_raw - Assume that we need to boot the OS (default:no)
1819 If yes, then during driver loading, the state of the board is
1820 ignored, and we reset the board and load the firmware anyway.
1821 fx_raw - Assume that the FX process needs help (default:yes)
1822 If false, we'll leave the FX processor in whatever state it is
1823 when the driver is loaded. The default is to download the
1824 microprogram and associated coefficients to set it up for
1825 "default" operation, whatever that means.
1826 debug_default - Debug parameters for card initialization
1827 wait_usecs - How long to wait without sleeping, usecs
1829 This magic number seems to give pretty optimal throughput
1830 based on my limited experimentation.
1831 If you want to play around with it and find a better value, be
1832 my guest. Remember, the idea is to get a number that causes us
1833 to just busy wait for as many WaveFront commands as possible,
1834 without coming up with a number so large that we hog the whole
1836 Specifically, with this number, out of about 134,000 status
1837 waits, only about 250 result in a sleep.
1838 sleep_interval - How long to sleep when waiting for reply
1840 sleep_tries - How many times to try sleeping during a wait
1842 ospath - Pathname to processed ICS2115 OS firmware
1843 (default:wavefront.os)
1844 The path name of the ISC2115 OS firmware. In the recent
1845 version, it's handled via firmware loader framework, so it
1846 must be installed in the proper path, typically,
1848 reset_time - How long to wait for a reset to take effect
1850 ramcheck_time - How many seconds to wait for the RAM test
1852 osrun_time - How many seconds to wait for the ICS2115 OS
1855 This module supports multiple cards and ISA PnP.
1857 Note: the firmware file "wavefront.os" was located in the earlier
1858 version in /etc. Now it's loaded via firmware loader, and
1859 must be in the proper firmware path, such as /lib/firmware.
1860 Copy (or symlink) the file appropriately if you get an error
1861 regarding firmware downloading after upgrading the kernel.
1863 Module snd-sonicvibes
1864 ---------------------
1866 Module for S3 SonicVibes PCI sound cards.
1867 * PINE Schubert 32 PCI
1869 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1870 - SoundCard must have onboard SRAM for this.
1871 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1873 This module supports multiple cards and autoprobe.
1875 Module snd-serial-u16550
1876 ------------------------
1878 Module for UART16550A serial MIDI ports.
1880 port - port # for UART16550A chip
1881 irq - IRQ # for UART16550A chip, -1 = poll mode
1882 speed - speed in bauds (9600,19200,38400,57600,115200)
1884 base - base for divisor in bauds (57600,115200,230400,460800)
1886 outs - number of MIDI ports in a serial port (1-4)
1888 adaptor - Type of adaptor.
1889 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1890 3 = MS-124W M/B, 4 = Generic
1892 This module supports multiple cards. This module does not support autoprobe
1893 thus the main port must be specified!!! Other options are optional.
1898 Module for Trident 4DWave DX/NX sound cards.
1899 * Best Union Miss Melody 4DWave PCI
1901 * Warpspeed ONSpeed 4DWave PCI
1904 * CHIC True Sound 4Dwave
1905 * Shark Predator4D-PCI
1906 * Jaton SonicWave 4D
1908 pcm_channels - max channels (voices) reserved for PCM
1909 wavetable_size - max wavetable size in kB (4-?kb)
1911 This module supports multiple cards and autoprobe.
1913 The power-management is supported.
1915 Module snd-usb-audio
1916 --------------------
1918 Module for USB audio and USB MIDI devices.
1920 vid - Vendor ID for the device (optional)
1921 pid - Product ID for the device (optional)
1922 device_setup - Device specific magic number (optional)
1923 - Influence depends on the device
1926 This module supports multiple devices, autoprobe and hotplugging.
1928 Module snd-usb-caiaq
1929 --------------------
1931 Module for caiaq UB audio interfaces,
1932 * Native Instruments RigKontrol2
1933 * Native Instruments Kore Controller
1934 * Native Instruments Audio Kontrol 1
1935 * Native Instruments Audio 8 DJ
1937 This module supports multiple devices, autoprobe and hotplugging.
1939 Module snd-usb-usx2y
1940 --------------------
1942 Module for Tascam USB US-122, US-224 and US-428 devices.
1944 This module supports multiple devices, autoprobe and hotplugging.
1946 Note: you need to load the firmware via usx2yloader utility included
1947 in alsa-tools and alsa-firmware packages.
1952 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1953 8233A, 8233C, 8235, 8237 (south) bridge.
1955 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1957 joystick - Enable joystick (default off) [VIA686A/686B only]
1958 ac97_clock - AC'97 codec clock base (default 48000Hz)
1959 dxs_support - support DXS channels,
1960 0 = auto (default), 1 = enable, 2 = disable,
1961 3 = 48k only, 4 = no VRA, 5 = enable any sample
1962 rate and different sample rates on different
1964 [VIA8233/C, 8235, 8237 only]
1965 ac97_quirk - AC'97 workaround for strange hardware
1966 See "AC97 Quirk Option" section below.
1968 This module supports one chip and autoprobe.
1970 Note: on some SMP motherboards like MSI 694D the interrupts might
1971 not be generated properly. In such a case, please try to
1972 set the SMP (or MPS) version on BIOS to 1.1 instead of
1973 default value 1.4. Then the interrupt number will be
1974 assigned under 15. You might also upgrade your BIOS.
1976 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1977 channels as the first PCM. On these channels, up to 4
1978 streams can be played at the same time, and the controller
1979 can perform sample rate conversion with separate rates for
1981 As default (dxs_support = 0), 48k fixed rate is chosen
1982 except for the known devices since the output is often
1983 noisy except for 48k on some mother boards due to the
1985 Please try once dxs_support=5 and if it works on other
1986 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1987 know the PCI subsystem vendor/device id's (output of
1989 If dxs_support=5 does not work, try dxs_support=4; if it
1990 doesn't work too, try dxs_support=1. (dxs_support=1 is
1991 usually for old motherboards. The correct implemented
1992 board should work with 4 or 5.) If it still doesn't
1993 work and the default setting is ok, dxs_support=3 is the
1994 right choice. If the default setting doesn't work at all,
1995 try dxs_support=2 to disable the DXS channels.
1996 In any cases, please let us know the result and the
1997 subsystem vendor/device ids. See "Links and Addresses"
2000 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
2001 additionally. The mpu_port option is for VIA686 chips only.
2003 The power-management is supported.
2005 Module snd-via82xx-modem
2006 ------------------------
2008 Module for VIA82xx AC97 modem
2010 ac97_clock - AC'97 codec clock base (default 48000Hz)
2012 This module supports one card and autoprobe.
2014 Note: The default index value of this module is -2, i.e. the first
2017 The power-management is supported.
2022 Module for virtual rawmidi devices.
2023 This module creates virtual rawmidi devices which communicate
2024 to the corresponding ALSA sequencer ports.
2026 midi_devs - MIDI devices # (1-4, default=4)
2028 This module supports multiple cards.
2033 Module for sound cards based on the Asus AV200 chip, i.e.,
2034 Xonar D2 and Xonar D2X.
2036 This module supports autoprobe and multiple cards.
2038 Power management is _not_ supported.
2043 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
2045 mic - Enable Microphone on V222 Mic (NYI)
2046 ibl - Capture IBL size. (default = 0, minimum size)
2048 This module supports multiple cards.
2050 When the driver is compiled as a module and the hotplug firmware
2051 is supported, the firmware data is loaded via hotplug automatically.
2052 Install the necessary firmware files in alsa-firmware package.
2053 When no hotplug fw loader is available, you need to load the
2054 firmware via vxloader utility in alsa-tools package. To invoke
2055 vxloader automatically, add the following to /etc/modprobe.conf
2057 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
2059 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
2060 /etc/modules.conf, instead.)
2061 IBL size defines the interrupts period for PCM. The smaller size
2062 gives smaller latency but leads to more CPU consumption, too.
2063 The size is usually aligned to 126. As default (=0), the smallest
2064 size is chosen. The possible IBL values can be found in
2065 /proc/asound/cardX/vx-status proc file.
2067 The power-management is supported.
2072 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
2074 ibl - Capture IBL size. (default = 0, minimum size)
2076 This module supports multiple cards. The module is compiled only when
2077 PCMCIA is supported on kernel.
2079 With the older 2.6.x kernel, to activate the driver via the card
2080 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
2081 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
2082 longer require a config file.
2084 When the driver is compiled as a module and the hotplug firmware
2085 is supported, the firmware data is loaded via hotplug automatically.
2086 Install the necessary firmware files in alsa-firmware package.
2087 When no hotplug fw loader is available, you need to load the
2088 firmware via vxloader utility in alsa-tools package.
2090 About capture IBL, see the description of snd-vx222 module.
2092 Note: snd-vxp440 driver is merged to snd-vxpocket driver since
2095 The power-management is supported.
2100 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
2102 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
2103 1 (auto-detect for YMF744/754 only)
2104 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
2105 1 (auto-detect for YMF744/754 only)
2106 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
2108 rear_switch - enable shared rear/line-in switch (bool)
2110 This module supports autoprobe and multiple chips.
2112 The power-management is supported.
2114 Module snd-pdaudiocf
2115 --------------------
2117 Module for Sound Core PDAudioCF sound card.
2119 The power-management is supported.
2125 The ac97_quirk option is used to enable/override the workaround for
2126 specific devices on drivers for on-board AC'97 controllers like
2127 snd-intel8x0. Some hardware have swapped output pins between Master
2128 and Headphone, or Surround (thanks to confusion of AC'97
2129 specifications from version to version :-)
2131 The driver provides the auto-detection of known problematic devices,
2132 but some might be unknown or wrongly detected. In such a case, pass
2133 the proper value with this option.
2135 The following strings are accepted:
2136 - default Don't override the default setting
2137 - none Disable the quirk
2138 - hp_only Bind Master and Headphone controls as a single control
2139 - swap_hp Swap headphone and master controls
2140 - swap_surround Swap master and surround controls
2141 - ad_sharing For AD1985, turn on OMS bit and use headphone
2142 - alc_jack For ALC65x, turn on the jack sense mode
2143 - inv_eapd Inverted EAPD implementation
2144 - mute_led Bind EAPD bit for turning on/off mute LED
2146 For backward compatibility, the corresponding integer value -1, 0,
2147 ... are accepted, too.
2149 For example, if "Master" volume control has no effect on your device
2150 but only "Headphone" does, pass ac97_quirk=hp_only module option.
2153 Configuring Non-ISAPNP Cards
2154 ============================
2156 When the kernel is configured with ISA-PnP support, the modules
2157 supporting the isapnp cards will have module options "isapnp".
2158 If this option is set, *only* the ISA-PnP devices will be probed.
2159 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
2160 together with the proper i/o and irq configuration.
2162 When the kernel is configured without ISA-PnP support, isapnp option
2163 will be not built in.
2166 Module Autoloading Support
2167 ==========================
2169 The ALSA drivers can be loaded automatically on demand by defining
2170 module aliases. The string 'snd-card-%1' is requested for ALSA native
2171 devices where %i is sound card number from zero to seven.
2173 To auto-load an ALSA driver for OSS services, define the string
2174 'sound-slot-%i' where %i means the slot number for OSS, which
2175 corresponds to the card index of ALSA. Usually, define this
2176 as the same card module.
2178 An example configuration for a single emu10k1 card is like below:
2179 ----- /etc/modprobe.conf
2180 alias snd-card-0 snd-emu10k1
2181 alias sound-slot-0 snd-emu10k1
2182 ----- /etc/modprobe.conf
2184 The available number of auto-loaded sound cards depends on the module
2185 option "cards_limit" of snd module. As default it's set to 1.
2186 To enable the auto-loading of multiple cards, specify the number of
2187 sound cards in that option.
2189 When multiple cards are available, it'd better to specify the index
2190 number for each card via module option, too, so that the order of
2191 cards is kept consistent.
2193 An example configuration for two sound cards is like below:
2195 ----- /etc/modprobe.conf
2197 options snd cards_limit=2
2198 alias snd-card-0 snd-interwave
2199 alias snd-card-1 snd-ens1371
2200 options snd-interwave index=0
2201 options snd-ens1371 index=1
2203 alias sound-slot-0 snd-interwave
2204 alias sound-slot-1 snd-ens1371
2205 ----- /etc/modprobe.conf
2207 In this example, the interwave card is always loaded as the first card
2208 (index 0) and ens1371 as the second (index 1).
2210 Alternative (and new) way to fixate the slot assignment is to use
2211 "slots" option of snd module. In the case above, specify like the
2214 options snd slots=snd-interwave,snd-ens1371
2216 Then, the first slot (#0) is reserved for snd-interwave driver, and
2217 the second (#1) for snd-ens1371. You can omit index option in each
2218 driver if slots option is used (although you can still have them at
2219 the same time as long as they don't conflict).
2221 The slots option is especially useful for avoiding the possible
2222 hot-plugging and the resultant slot conflict. For example, in the
2223 case above again, the first two slots are already reserved. If any
2224 other driver (e.g. snd-usb-audio) is loaded before snd-interwave or
2225 snd-ens1371, it will be assigned to the third or later slot.
2228 ALSA PCM devices to OSS devices mapping
2229 =======================================
2231 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
2232 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
2233 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
2234 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
2235 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
2236 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
2237 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
2238 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
2239 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
2241 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
2242 sound card number and second means device number. The ALSA devices
2243 have either 'c' or 'p' suffix indicating the direction, capture and
2244 playback, respectively.
2246 Please note that the device mapping above may be varied via the module
2247 options of snd-pcm-oss module.
2250 Proc interfaces (/proc/asound)
2251 ==============================
2253 /proc/asound/card#/pcm#[cp]/oss
2254 -------------------------------
2255 String "erase" - erase all additional informations about OSS applications
2256 String "<app_name> <fragments> <fragment_size> [<options>]"
2258 <app_name> - name of application with (higher priority) or without path
2259 <fragments> - number of fragments or zero if auto
2260 <fragment_size> - size of fragment in bytes or zero if auto
2261 <options> - optional parameters
2262 - disable the application tries to open a pcm device for
2263 this channel but does not want to use it.
2264 (Cause a bug or mmap needs)
2265 It's good for Quake etc...
2266 - direct don't use plugins
2267 - block force block mode (rvplayer)
2268 - non-block force non-block mode
2269 - whole-frag write only whole fragments (optimization affecting
2271 - no-silence do not fill silence ahead to avoid clicks
2272 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
2273 instead of filled blocks
2275 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
2276 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
2277 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
2280 Early Buffer Allocation
2281 =======================
2283 Some drivers (e.g. hdsp) require the large contiguous buffers, and
2284 sometimes it's too late to find such spaces when the driver module is
2285 actually loaded due to memory fragmentation. You can pre-allocate the
2286 PCM buffers by loading snd-page-alloc module and write commands to its
2287 proc file in prior, for example, in the early boot stage like
2288 /etc/init.d/*.local scripts.
2290 Reading the proc file /proc/drivers/snd-page-alloc shows the current
2291 usage of page allocation. In writing, you can send the following
2292 commands to the snd-page-alloc driver:
2294 - add VENDOR DEVICE MASK SIZE BUFFERS
2296 VENDOR and DEVICE are PCI vendor and device IDs. They take
2297 integer numbers (0x prefix is needed for the hex).
2298 MASK is the PCI DMA mask. Pass 0 if not restricted.
2299 SIZE is the size of each buffer to allocate. You can pass
2300 k and m suffix for KB and MB. The max number is 16MB.
2301 BUFFERS is the number of buffers to allocate. It must be greater
2302 than 0. The max number is 4.
2306 This will erase the all pre-allocated buffers which are not in
2313 ALSA project homepage
2314 http://www.alsa-project.org
2316 ALSA Bug Tracking System
2317 https://bugtrack.alsa-project.org/bugs/
2320 mailto:alsa-devel@alsa-project.org
projects / linux-beck.git / blob