Speaker delay settings, Test signals, Output channel trim settings – Extron Electronics SSP 7.1 User Guide User Manual
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Speaker Delay Settings
There are two different signal delays that compensate for different needs.
Compensation delay — In a room where speakers are not equidistant from the listener,
sound from the closest speaker reaches the listener before sound from the farthest speaker.
This feature allows the user to enter the speaker distance value for each speaker output
channel. The application calculates the delay values for the closest speakers, up to 100.0 ms,
so that all audio arrives at a central location (the “sweet spot”) at the same time.
Lip sync offset — Video delays occur due to changes in programming from a source (TV,
Cable, Satellite, or DVD player) and also if the video signal has to be processed through
another device between the source and the display. The lip sync offset feature allows the
user to delay the audio sent to all output channels so that video and audio output are
synchronized.
Since each source may need a different level of compensation, the lip sync offset for each
input is independently adjustable from 0.0 to 100.0 ms. Apply lip sync offset to the audio
until what is heard matches up with what is seen on the display.
To configure these settings using the SSP 7.1 Setup and Control Software, see
on page 32.
Test Signals
Test signals are used during setup to calibrate the level for each channel and to ensure
proper connection between the individual output channels of the SSP 7.1 and the line
level input channels of an audio signal processor, a receiver with built in amplifier, or a
stand alone amplifier that powers the loudspeakers.
The three options for test signal source are pink noise, Dolby noise, and an external source.
By default, the test signal is switched off.
Pink Noise — Pink noise is a random signal, generated by the SSP 7.1, with all audio
frequencies present. It provides equal energy per octave to provide a flat response over all
frequencies. The main purpose of pink noise is to calibrate the interaction of a speaker with
its environment.
Dolby Noise — Dolby noise provides a bandpass-filtered noise, centered at 750 Hz with a
12 dB/octave roll off. This signal is also generated by the SSP 7.1 and is used to set speakers
to the same level when calibrating the room.
Active Input — This option requires an external test signal source, such as a signal
generator, played through the selected input source. Generally, this is a device with an
analog signal output, with the SSP 7.1 analog input used as the active input.
Signal generators are usually used to test specific decoding mode outputs. When the
External Source option is chosen, the speakers that receive the test signal can be specified.
To calibrate speaker output, use any of these test signals with the SSP 7.1 Setup and Control
Software, see
on page 36.
Output Channel Trim Settings
This control adjusts the output channel trim level for each output channel to match the
levels to the unique needs of any listening environment. The level can be adjusted within the
range from -24 dB to +12 dB. The default setting for each speaker is 0 dB. See
on page 39 for more information.
SSP 7.1 • Setup
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