Extron electronics SSP 7.1 User Manual page 109

Low Frequency Effects (LFE) — This information is encoded in the source signal and is intended to be
played back by the subwoofer. Bass management mixes this information with the low frequency
signals from designated output channels and directs it to the subwoofer (if present) and speakers
that have been set to output the signal. (Also see Bass Management, Crossover Frequency, and Speaker
Size.)
Mode Override — The user can customize the listening mode to the needs of the source format, speaker
configuration, and the venue in which the system is installed through the use of the Listening Mode
Override. This is a front panel control that can be further refined by the SSP 7.1 Setup and Control
Software.
Mute — It is possible to completely silence the output from all channels (universal mute) or each
channel individually.
Panorama Control — This feature extends the Center Width Control, so that all or part of the center
image can be heard from the side surround speakers for a "wraparound" effect. The feature may be
on or off. The default setting is Off.
Pink noise — Pink noise is a random signal with all audio frequencies present, that is generated by
the SSP 7.1. It provides equal energy per octave to provide a flat response over all frequencies. The
main purpose of pink noise is to calibrate a speaker's interaction with its environment.
Test Signal — Test signals are used during setup to calibrate each channel's levels and to ensure proper
connection between the SSP 7.1's individual output channels and the line level input channels of an
audio signal processor, a receiver with built in amplifier, or a stand alone amplifier that will power
the loudspeakers. There are three options for test source: pink noise, Dolby noise, and an external
source.
Simple Instruction Set (SIS) — The SSP 7.1 accepts SIS commands from a host device such as a
computer running the HyperTerminal utility or other control system. SIS commands consist of a
string (one or more characters per command field). The commands are used to configure the SSP
7.1 unit and, depending on the command, will usually produce a response which can be seen on the
screen of the host device.
Source Format — Audio signals are recorded and processed in different formats. The recorded signals
contain differing amounts of information, encoded in different ways, and the format determines
how accurately the sound that is played back reflects the original sound as it was recorded.
Speaker Size — Speakers can be set to Large, Small, or None. Speakers set to Large play the full
range of sound intended for that output channel. Speakers set to small play only the frequencies
that are above the crossover frequency. The low frequency portion of the signal from that channel
is incorporated into Bass Management and directed to the subwoofer (if present) and speakers that
have been set to large. Speakers that are set to None, are effectively removed from the system and
do not receive an output signal. (Also see Bass Management, Crossover Frequency, and Low Frequency
Effects.)
SSP 7.1 — The SSP 7.1 is a 7.1 channel Surround Sound processor with selectable listening modes that
can be changed to match the source format. It can accept 2 channel analog signals, as well as digital
PCM signals, and output them through various matrix decoding mode options for use in 5.1 to 7.1
system configurations. The SSP 7.1 can decode and process licensed, branded digital source formats
from Dolby Digital and DTS, in their originally encoded formats.
SSP 7.1 Setup and Control Software — The SSP 7.1 Setup and Control Software provides an intuitive,
easy to operate, graphical user interface that allows the user to configure the sound system quickly
and efficiently. It is on the disk that comes with the unit or it can be downloaded, free of charge,
from the Extron Web site (www.extron.com).
Tone Controls — These controls regulate the Bass and Treble settings for the system, using the SSP 7.1
Setup and Control Software or SIS commands.
SSP 7.1 • Index and Glossary C-7