Adafruit Wave Shield for Arduino Kit - v1.1 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 page on Adafruit. 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/FAT32-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 yATmega328-based Arduino (Duemilanove, Uno or compatib This shield is not Mega or Leonardo compatible!