Patent ID: 8233639

Claim:
An audio codec comprises: an input for receiving audio information; audio processing circuitry operably coupled to produce a first stereo audio signal, a second stereo audio signal, and a monotone audio signal based on the audio information; a low pass filter operably coupled to filter the monotone audio output, wherein the low pass filter passes a bass component of the monotone audio signal substantially unattenuated and attenuates higher frequency components of the monotone audio signal; a high pass filter operably coupled to filter the first stereo audio output, wherein the high passes filter passes a treble component of the first stereo audio signal substantially unattenuated and attenuates lower frequency components of the first stereo audio signal; a band pass filter operably coupled to filter the second stereo audio output, wherein the band pass filter passes a mid band component of the second audio signal substantially unattenuated and attenuates low frequency components and high frequency components of the second stereo audio signal; and a summing module operably coupled to sum the bass component, the treble component, and the mid band component to produce a tone controlled audio output.