+/*
+ * Instrument record, aka "Patch"
+ */
+
+/* FM operator */
+struct fm_operator {
+ unsigned char am_vib;
+ unsigned char ksl_level;
+ unsigned char attack_decay;
+ unsigned char sustain_release;
+ unsigned char wave_select;
+} __attribute__((packed));
+
+/* Instrument data */
+struct fm_instrument {
+ struct fm_operator op[4];
+ unsigned char feedback_connection[2];
+ unsigned char echo_delay;
+ unsigned char echo_atten;
+ unsigned char chorus_spread;
+ unsigned char trnsps;
+ unsigned char fix_dur;
+ unsigned char modes;
+ unsigned char fix_key;
+};
+
+/* type */
+#define FM_PATCH_OPL2 0x01 /* OPL2 2 operators FM instrument */
+#define FM_PATCH_OPL3 0x02 /* OPL3 4 operators FM instrument */
+
+/* Instrument record */
+struct fm_patch {
+ unsigned char prog;
+ unsigned char bank;
+ unsigned char type;
+ struct fm_instrument inst;
+ char name[24];
+ struct fm_patch *next;
+};
+
+