soundfont_voice_parm
struct soundfont_voice_parm parm; /* voice envelope parameters */
#define parm_offset(tag) xoffsetof(struct soundfont_voice_parm *, tag)
struct soundfont_voice_parm *parm;
static void init_voice_parm(struct soundfont_voice_parm *pp);
init_voice_parm(struct soundfont_voice_parm *pp)