I'm currently writing a thesis about acoustic architecture and I want to have something embedded in the final book which is capable of playing a series of (previously recorded) sounds at the push of a button, either through tiny speakers (a bit like those kids books which play songs, but less corny) or through some attached headphones (the messy option) Is there anything out there which is:
1. tiny and can be embedded in the back cover of a hardback book
2. lets me upload multiple sound files to it
3. allows playback through mini speakers at the push of a button
Or would I be better off buying a mini (cheap) Mp3 player and little headphones?