1. A method of audio signal processing, said method comprising performing each of the following acts using a device configured to process audio signals: based on information from a first audio signal, producing an anti-noise signal; separating a target component of a second audio signal from a noise component of the second audio signal to produce at least one among (A) a separated target component and (B) a separated noise component; and based on the anti-noise signal, producing an audio output signal, wherein the audio output signal is based on at least one among (A) the separated target component and (B) the separated noise component.