The VS1033D-L is a great MP3 decoder, and with this breakout board, it's easy to drop it into any project. The VS1033 is capable of decoding MP3/AAC/WMA/MIDI audio and encoding IMA ADPCM. Can drive 30 Ohm headphones with no additional power supply. In this new revision, the board ties the TEST pin to IOVDD, better correcting the issues which were previously fixed by a jumper wire. Project description, more information and ordering can be found at https://www.sparkfun.com/products/10608 Datasheet: http://www.vlsi.fi/fileadmin/datasheets/vlsi/vs1033d.pdf