I had an aux input on the back of my car stereo wired to a Toshiba laptop shoved into the glovebox of my Chevy Lumina. The laptop ran WinAmp with all my bootleg mp3s. There was no power connection, and laptop batteries were terrible back then, so yeah, I could listen to music for about 20 minutes. Oh, and there was no interaction with the music unless I was at a long stoplight. Anyway, I thought I was Hackerman. LOL