TruSurround XT is the second generation of SRS TruSurround. Building upon its patented predecessor, TruSurround XT solves the problem of playing 5.1 or 6.1 multichannel content over two speakers (or headphones). TruSurround XT accepts input from up to a seven channel (6.1) audio source and processing a two-channel output. When receiving multichannel content, TruSurround XT virtualizes the channels, creating "phantom" speakers that appear to extend all around the listener. When receiving mono or stereo content, TruSurround XT presents an expansive three dimensional sound field.