if (opt_modulation_envelope) 
if (opt_modulation_envelope && vp->sample->modes & MODES_ENVELOPE) 
static inline int update_signal(int v){	Voice *vp = &voice[v];	if (vp->envelope_increment && update_envelope(v))		return 1;	if (vp->tremolo_phase_increment)		update_tremolo(v);	if (opt_modulation_envelope)		update_modulation_envelope(v);	return apply_envelope_to_amp(v);}
4357	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4357/1816fbaa82c5fccf8842ce3ab6fd2490f1eddd41/mix.c/clean/timidity/mix.c