Looking to embed mp3 audio into a microcontroller project? I just came across this unit and would be curious to see how it works:

VMUSIC is a product that not only lets you add USB Flash drive interfacing to your product but allows you to play back MP3 and other popular digital music formats direct from a USB Flash drive. Extensions to the VDAP command set allow you to play a selected file as well as control the volume, balance, etc. of the sound channel and monitor the status of the file being played.

VMUSIC module lets you embed mp3 audio playback via USB flash drive – Link. (Thanks, Byron!)