YDSXGR_GLOBALCTRL
reg = snd_ymfpci_readw(chip, YDSXGR_GLOBALCTRL);
old_reg = snd_ymfpci_readw(chip, YDSXGR_GLOBALCTRL);
snd_ymfpci_writew(chip, YDSXGR_GLOBALCTRL, reg);
ctrl = snd_ymfpci_readw(chip, YDSXGR_GLOBALCTRL);
snd_ymfpci_writew(chip, YDSXGR_GLOBALCTRL, ctrl & ~0x0007);
ctrl = snd_ymfpci_readw(chip, YDSXGR_GLOBALCTRL);
snd_ymfpci_writew(chip, YDSXGR_GLOBALCTRL, ctrl & ~0x0007);