Patent ID: 7177432

Claim:
A sound processing system, comprising: a head unit comprising a left channel and a right channel; a decoder connected to the head unit, where the decoder generates decoded signals in response to audio signals from the head unit; a crossbar matrix mixer connected to the head unit and to the decoder, the crossbar matrix mixer to receive audio signals from the head unit, the crossbar matrix mixer to receive the multiple decoded signals from the decoder; a first analog to digital converter (ADC) connected to the left channel, the decoder, and the crossbar matrix mixer; and a second analog to digital converter (ADC) connected to the right channel, the decoder, and the crossbar matrix mixer; where the crossbar matrix mixer generates mixed output signals in response to the audio signals and the multiple decoded signals; where the mixed output signals comprise active matrix decoded signals when the audio signals comprise a stereo signal, and where the mixed output signals comprise passive matrix processed signals when the audio signals comprise a monaural signal.