Patent ID: 8467546

Claim:
An audio circuit for a mobile terminal, comprising: a microphone; an audio signal processing circuit having an input coupled to the microphone, the audio processing circuit having a bandpass filter configured to pass through only a voice frequency band component of an audio signal from the microphone, and a switch that selects between a voice mode utilizing the bandpass filter and comfort noise insertion and a full fidelity mode bypassing the bandpass filter and comfort noise insertion responsive to a mode signal coupled thereto; and a controller that sets a first state of the mode signal to select the voice mode in response to the mobile terminal operating to handle a voice call and that sets a second state of the mode signal to select the full fidelity mode; wherein the controller is configured to automatically select the first state responsive to initiation of the voice call, wherein the controller is configured to switch to the second state of the mode signal during the voice call and while continuing the call responsive to a user input through a user interface in the mobile terminal, and wherein the controller is configured to select the full fidelity mode bypassing the bandpass filter and initiate recording of an audio signal from the microphone in the full fidelity mode responsive to a user request to record music, the music including frequencies that extend beyond a voice frequency band.