Download the latest library here Place the uncompressed AF_Wave folder (which has the .c and .h files) into the hardware/libraries folder (in your Arduino installation). Then check out the examples for how to use it.

Before you try to play audio, you'll want to free up some Arduino RAM, so that you don't end up with a nasty stack-overflow. Follow these instructions on how to get more RAM by reducing the input Serial library buffer.

The library is based off of Roland Riegel's AVR FAT16 code, but pared down quite a bit to reduce flash and RAM usage. There are also some strange optimizations to make it play audio better.

If you need some audio to test with, here is a synthesized voice saying "Hello world"

• Schematics in PNG format
• Schematics and board layout in EagleCAD format