Speaker Delay Settings - Extron electronics SSP 7.1 User Manual

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
heard matches what is seen on the display.
To configure these settings using the SSP 7.1 Setup and Control Software, see
Tab
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
Source
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
Source
To calibrate speaker output, use any of these test signals with the SSP 7.1 Setup and Control
Software, see
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
for more information.
0.0
on page 29.
. By default, the test signal is switched
option is chosen, the speakers that receive the test signal can be specified.
Test signals on page 32.
dB to +12 dB. The default setting for each speaker is
to ms. Apply lip sync offset to the audio until what is
100.0
,
Pink Noise Dolby Noise
.
Off
0 dB. See
Speaker Delay
, and an
External
External
Output Trim on page 35
SSP 7.1 • Setup 16