Extron Electronics SSP 7.1 User Guide - Manual (Page 67)

Reference
Material
This section provides information about Source Formats and Listening Mode Options
and Usage .
Source Formats
Surround Channel Information
Surround channel information is written in the following format:
A/B.C (For example 3/2.1)
A represents the number of front channels (maximum 3: front right, front left, and center).
If A is 1, the source format has a mono encoded signal for playback through the center
channel. If A is 2, the source format encodes two discrete channels for stereo playback
through the front right and front left channels. If A is 3, there is a discrete encoded signal for
all three front speakers.
B represents the number of surround channels (maximum 3: surround right, surround left,
and back). If B is 1, the source format has a mono encoded signal for playback as dual mono
through the surround right and surround left channels. If B is 2, the source format encodes
two discrete channels for stereo playback through the surround right and surround left
channels. If B is 3, there is a discrete encoded signal for all three speakers, including the back
speaker.
NOTE: There is no “4” option because, while the SSP 7.1 can output up to eight
full bandwidth channels, there are presently no source formats that can pass
digital bit stream audio information containing 7.1 discrete encoded channels
through S/PDIF connections, which is the connection type that the SSP 7.1
supports.
C represents the presence or absence of LFE (1 = present; 0 = none or absent). This is the
discrete bass information, normally designated for use with the subwoofer channel, but may
be mixed with other channels in the absence of a subwoofer.
SSP 7.1 • Reference Material 61