CMPCI_SB16_MIXER_OUTMIX
bits = cmpci_mixerreg_read(sc, CMPCI_SB16_MIXER_OUTMIX);
cmpci_mixerreg_write(sc, CMPCI_SB16_MIXER_OUTMIX, bits);
cmpci_mixerreg_write(sc, CMPCI_SB16_MIXER_OUTMIX,