Adafruit Wave Shield for Arduino Kit - v1.1

This kit makes adding quality audio to an electronic project. It can play up to 22Khz, 12-bit uncompressed audio files of any length. It has an onboard DaC, filter and op-amp for high quality output. Volume can be controlled with the onboard thumbwheel potentiometer.

features:

• Can play any uncompressed 22KHz, 16bit, mono Wave (.wav) files of any size. While it isnt CD quality, it is certainly good enough to play music, have spoken word, or audio effects. Check out the demo video/audio at the webpage
• Output is mono, into L and R channels, standard 3.5mm headphone jack and a connection for a speaker that is switched on when the headphones are unplugged
• Files are read off of a FAT16-formatted SD/MMC card 
• Included library and examples makes playing audio easy
• Please note that the library is rather bulky, requiring 10K of flash and more than 1/2 K of RAM for buffering audio. It works fine using an ATmega168-based Arduino (or compatible) but for more complex projects I strongly recommend upgrading to an ATmega328!

More information, including design notes, schematics, library, examples, etc is at the Wave Shield webpage