OPL3_REG_CONNECTION_SELECT
opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT;
opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT;
opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT,
opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, 0x00); /* Clear 4-op connections */
opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, reg_val);