Patent ID: 8472631

Claim:
A method of processing a plurality of audio input signals to create two audio output signals, the method comprising: receiving a left front input signal and a right front input signal, each of the left and right front input signals comprising first audio information; processing, with one or more processors, one or both of the left and right front input signals with a first filter to produce one or more processed front signals; receiving a left rear input signal and a right rear input signal, each of the left and right rear input signals comprising second audio information; using the one or more processors to process the left and right rear input signals with a second filter to produce processed left and right rear signals, the second filter having a different frequency response than the first filter; providing a left output signal comprising a combination of the one or more processed front signals, the left rear input signal, and the processed left rear signal; and providing a right output signal comprising a combination of the one or more processed front signals, the right rear input signal, and the processed right rear signal.