Comment by anthk

Audio tracks and WAV/AU files weren't actually decoded, but straightly send to the sound card as bits. That's it, a command like

        cat file.wav > /dev/dsp 

Would just work under Unix (/dev/audio under plan9/9front)

Thus, making a function for Quake to read the CD bits to the sound card would create almost no CPU usage, even less with DMA.