Sunday, 28 October 2012
There's definitely some scope with data-over-CD-changer-protocol. You've got disc number, track number, time elapsed. Bonus points if you drive a CD changer full of discs where each track on each disc is a different n-bit symbol, perhaps encoded as a DTMF tone or something. Wouldn't be very pleasant to listen to, but it would be slow as hell (and that's kinda the point).