26  *		bytes 4 and 5	- parameter P1 (unsigned short)
31  *		Unused parameters (P1 and/or P2 *MUST* be initialized to zero).
32  *		_GUS_NUMVOICES	- Sets max. number of concurrent voices (P1=14-31, default 16)
34  *		_GUS_VOICEON	- Starts voice (P1=voice mode)
37  *		_GUS_VOICEMODE	- Alters the voice mode, don't start or stop voice (P1=voice mode)
38  *		_GUS_VOICEBALA	- Sets voice balance (P1, 0=left, 7=middle and 15=right, default 7)
39  *		_GUS_VOICEFREQ	- Sets voice (sample) playback frequency (P1=Hz)
40  *		_GUS_VOICEVOL	- Sets voice volume (P1=volume, 0xfff=max, 0xeff=half, 0x000=off)
41  *		_GUS_VOICEVOL2	- Sets voice volume (P1=volume, 0xfff=max, 0xeff=half, 0x000=off)
45  *		_GUS_RAMPRANGE	- Sets limits for volume ramping (P1=low volume, P2=high volume)
46  *		_GUS_RAMPRATE	- Sets the speed for volume ramping (P1=scale, P2=rate)
47  *		_GUS_RAMPMODE	- Sets the volume ramping mode (P1=ramping mode)
76 #define _GUS_CMD(chn, voice, cmd, p1, p2) \  argument
80 					*(unsigned short*)&_seqbuf[_seqbufptr+4] = p1;\
84 #define GUS_NUMVOICES(chn, p1)			_GUS_CMD(chn, 0, _GUS_NUMVOICES, (p1), 0)  argument
85 #define GUS_VOICESAMPLE(chn, voice, p1)		_GUS_CMD(chn, voice, _GUS_VOICESAMPLE, (p1), 0)	/* OBSOLET…  argument
86 #define GUS_VOICEON(chn, voice, p1)		_GUS_CMD(chn, voice, _GUS_VOICEON, (p1), 0)  argument
89 #define GUS_VOICEMODE(chn, voice, p1)		_GUS_CMD(chn, voice, _GUS_VOICEMODE, (p1), 0)  argument
90 #define GUS_VOICEBALA(chn, voice, p1)		_GUS_CMD(chn, voice, _GUS_VOICEBALA, (p1), 0)  argument
93 #define GUS_VOICEVOL(chn, voice, p1)		_GUS_CMD(chn, voice, _GUS_VOICEVOL, (p1), 0)  argument
94 #define GUS_VOICEVOL2(chn, voice, p1)		_GUS_CMD(chn, voice, _GUS_VOICEVOL2, (p1), 0)  argument
96 #define GUS_RAMPRATE(chn, voice, p1, p2)	_GUS_CMD(chn, voice, _GUS_RAMPRATE, (p1), (p2))  argument
97 #define GUS_RAMPMODE(chn, voice, p1)		_GUS_CMD(chn, voice, _GUS_RAMPMODE, (p1), 0)  argument
98 #define GUS_RAMPON(chn, voice, p1)		_GUS_CMD(chn, voice, _GUS_RAMPON, (p1), 0)  argument
100 #define GUS_VOLUME_SCALE(chn, voice, p1, p2)	_GUS_CMD(chn, voice, _GUS_VOLUME_SCALE, (p1), (p2))  argument