I've been playing a lot of DOS games like Alien Rampage and Commander Keen in Invasion of the Vorticons. While they're great games, they're sorely lacking something crucial: music.

I was wondering if there are any DOS programs/applications that allow me to play music files (MP3, WAV, CD audio, etc.) while another program is running. I know I could just play them in the background with Quicktime or iTunes, but it's a pain to have to minimize the window just to click the replay button on Quicktime every time the song ends, and programs like iTunes cause serious lag.