The Open Music Labs Codec Shield gives your Arduino (or Maple) development board access to the all of the audio processing power of the Wolfson WM8731 codec. The WM8731 is a low-power stereo audio codec with stereo 24-bit multi-bit sigma delta ADCs and DACs which are used with oversampling digital interpolation and decimation filters. Thanks to the variable sampling frequency of the codec, even the relatively slow Arduino can grab and alter audio in real-time. Project description, more information and ordering can be found at https://www.sparkfun.com/products/11290 Datasheet: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/Arduino/Shields/WolfsonWM8731.pdf Arduino Library: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/Arduino/Shields/AudioCodecNew.zip Maple Library: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/Arduino/Shields/AudioCodec_Maple.zip Codec Shield Wiki: http://wiki.openmusiclabs.com/wiki/AudioCodecShield Product Video: http://youtu.be/WdNAQIR5iSI?t=8m45s