Matrix decoder

An audio technology where a finite number of incoming audio channels (eg., 2) are decoded into a larger number of channels on play back (eg., 5). The channels are generally, but not always, arranged for decoding by and encoder, and decoded for playback by a decoder.

The notation for matrix encoding consists of the number of incoming audio channels separated by a colon from the number of decoded channels. For example, a two-channels decoded to four-channels would be notated:

2:4

Five channels decoded to six channels would be notated:

5:6

Many matrix encoders take advantage of the Haas effect, as well as other audio cues inherent in the source channels.