OpenBSD Audio
aucat
Play using Convert and play an mp3 using OpenBSD audio subsystem. Volume buttons on MSI Wind also works.
lame --decode ./song47.mp3 ./song47.wav
aucat -i song47.wav
High end sound card support
M-Audio Delta Audiophile 2496 support is added in OpenBSD 4.8. This enables you to create a both low cost and high end mixer/player/server using OpenBSD. This PCI card is available from 830 sek from http://www.emusic.se.
See some audio server links below
*Computer Audiophile Pocket Server