Audio data processing circuitry 300 includes a plurality of analog inputs 101 for receiving analog audio data and a digital input 105 for receiving digital audio data. A analog mixer 312 mixes analog data received at said plurality of analog inputs 101 to generate a mixed analog audio stream. An analog-to-digital...http://www.google.ca/patents/US6259957?utm_source=gb-gplus-sharePatent US6259957 - Circuits and methods for implementing audio Codecs and systems using the same
