Stereo paired speaker system with center extraction

A loudspeaker comprising:

• a plurality of transducers;
• and
• a controller coupled with the plurality of transducers,
• wherein the loudspeaker is configured to both output stereo audio on its own in a first mode, and pair with an additional loudspeaker in a second mode, wherein in the second mode, the controller is configured to:
• receive a left channel audio input signal and a right channel audio input signal;
• extract a center channel signal from the left channel audio input signal and the right channel audio input signal;
• and
• provide an audio output signal to at least one of the plurality of transducers for outputting the center channel signal,
• wherein the center channel signal comprises correlated content from the left channel audio input signal and the right channel audio input signal, wherein at least one of the plurality of transducers outputs the center channel signal,
• wherein the center channel signal is extracted using left, right correlation information and amplitude information in time domain or frequency domain,
• wherein the center channel signal of one of the at least two distinct loudspeakers is different from the center channel signal of another of the at least two distinct loudspeakers, and
• wherein the center channel signal of the one of the at least two distinct loudspeakers includes a greater percentage of the left channel audio input signal relative to the center channel signal of the other of the at least two distinct loudspeakers.

A method of controlling audio output from at least two distinct loudspeakers each having a plurality of transducers, the method comprising:

• at each of the loudspeakers:
• receive a left channel audio input signal and a right channel audio input signal;
• extract a center channel signal from the left channel audio input signal and the right channel audio input signal;
• assign output channels according to a number of distinct loudspeakers in the at least two loudspeakers;
• provide an audio output signal to the plurality of transducers for outputting the center channel signal, and
• maintain synchronization between the distinct loudspeakers using clock signals,
• wherein the center channel signal comprises correlated content from the left channel audio input signal and the right channel audio input signal,
• wherein the center channel signal is extracted using left, right correlation information and amplitude information in time domain or frequency domain.