Valid sound card names (comma separated):
sb16        Creative Sound Blaster 16
pcspk       PC speaker
hda         Intel HD Audio
gus         Gravis Ultrasound GF1
es1370      ENSONIQ AudioPCI ES1370
cs4231a     CS4231A
adlib       Yamaha YM3812 (OPL2)
ac97        Intel 82801AA AC97 Audio

-soundhw all will enable all of the above
