OPL3_TREMOLO_DEPTH 830 sound/drivers/opl3/opl3_midi.c opl3->drum_reg |= OPL3_TREMOLO_DEPTH; OPL3_TREMOLO_DEPTH 832 sound/drivers/opl3/opl3_midi.c opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH; OPL3_TREMOLO_DEPTH 560 sound/drivers/opl3/opl3_synth.c reg_val |= OPL3_TREMOLO_DEPTH;