OPL3_REG_PERCUSSION
opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00);
opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, opl3->drum_reg);
opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00); /* Melodic mode */
opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, reg_val);