Emotiva DMC-1 User Manual page 66

DTS ES (6.1)
All DTS-ES sources have the surround back channel matrixed into the left and right surrounds.
Newer DVD releases also have a discrete surround back channel, in addition to the same information
matrixed.
DISCRETE ES sources: the DMC-1 DTS-ES discrete decoder will decode the discrete surround back
channel. It also removes the surround back matrix from the left and right surrounds, and restores
them to be fully independent channels.
MATRIX ES sources: If there is no discrete surround back channel, the DMC-1 decodes the matrixed
surround back channel from the left and right surrounds, and restores them to fully independent
channels.
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