CTL_MAIN_VOLUME  1251 include/linux/soundcard.h #define SEQ_MAIN_VOLUME(dev, voice, value) SEQ_CONTROL(dev, voice, CTL_MAIN_VOLUME, (value*16383)/100)
CTL_MAIN_VOLUME   982 sound/oss/opl3.c 		case CTL_MAIN_VOLUME:
CTL_MAIN_VOLUME  1075 sound/oss/opl3.c 	devc->voc[voice].volume = info->controllers[CTL_MAIN_VOLUME];