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

-soundhw all will enable all of the above
