cmss is a 2-channel to 5.1-channel sound processor similar in some aspects to a dolby surround pro logic processor.

    the cmss music mode creates a convincing 5.1-channel surround soundfield with typical stereo sources, whether they are dolby surround-encoded or not. it works well with dolby pro logic, wave, avi and midi program material. in essence, cmss music mode puts you “on the stage” — giving you a virtual audio impression of being on stage with the musicians during a musical performance. in a similar manner, the cmss movie mode provides an audio impression of being “front and center” at a movie screening. dialog and all normally centered sounds from a stereo program are heard through the center speaker. use this mode whenever a music program has sounds you want to blend with on-screen action or dialog. unlike pro logic decoding, cmss music, movie and fourpoint/5.1 din modes are appropriate for use with multicoded sources such as dvd games. in some game titles, the movie sequences may be encoded in dolby surround but the game sequences may be in the wav format. cmss movie mode supports 5.1- channel output for .wav, .avi, .midi and other audio software formats. few, if any of these kinds of formats, are dolby surround encoded.