Classe Audio SSP-800 Owner's Manual page 31

There are many multi-channel formats available. Table1, below, identifies
the most common multi-channel formats to help you sort out some of the
possibilities.
Table 1: Common multichannel modes
Name # Chs
analog stereo 2
analog multi- 6-8
channel input
Dolby Surround 4
Pro Logic
Dolby Pro Up to 5.1
Logic II
Dolby Pro Up to 7.1
Logic IIx
Dolby Digital 1.0-5.1
(formerly AC-3)
Dolby 6.1
Digital EX
DTS 1.0-5.1
DTS-ES Matrix 6.1
DTS-ES Discrete 6.1
DTS Neo:6 5-6
Matrix/Discrete
Discrete Found on almost all sources, including
tape decks, tuners, and CD players.
Discrete A multi-channel analog input used
mostly for SACD & DVD-Audio.
Matrix The original matrix decoding system
designed to squeeze four channels into
two and then retrieve them.
Matrix An improvement of Dolby's original
Pro Logic matrix decoder, Dolby PLII
is designed for 5.1 surround systems.
Matrix An improvement of Dolby PLII, this
version uses the 2ch or 5.1channel
source audio to create as many as 7.1
channels (depending on speaker setup)
of surround sound.
Discrete The most common modern digital
source, used in HDTV, DVD, etc.
Discrete A 7th channel of discrete information
was recorded during filming and
is encoded into the media. This
information is used to create a single
rear center, or two mono rear centers
depending on the speaker setup (6.1
or 7.1).
Discrete Similar to Dolby Digital in practice,
though it uses a different technology.
Mostly Discrete The center rear channel is a matrix
channel encoded into the left and
right surround channels. The
processor reads flags and "unfolds"
the center rear channel information;
all other channels are discrete.
Discrete All 6.1 channels are discrete
Matrix Designed for the playback of film or
music sources and can derive 5 or 6
channels with surround and/or rear
speakers
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