gm_volume 700 sound/core/seq/seq_midi_emul.c chan->gm_volume = 127; gm_volume 52 sound/drivers/opl3/opl3_midi.c volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127); gm_volume 375 sound/drivers/opl4/opl4_synth.c att += snd_opl4_volume_table[voice->chan->gm_volume & 0x7f];