Subwoofer; Crossover Frequency; Speaker Delay Settings - Extron electronics SSP 7.1 User Manual

Subwoofer

This option allows the subwoofer to be enabled or disabled. When the subwoofer
is enabled, the signal contains filtered low frequency signals from speakers set to
small in addition to the LFE signal from the source format. If the subwoofer is
absent or disabled, the LFE signal is mixed with the bass information of all speakers
in the system that are set to large, except the center speaker.
N When the Surround Side and Surround Back speakers are set to None, all
multichannel input signal formats are downmixed and output on all the system's
remaining channels.
In addition, in the absence of a Center channel, mono signals, are output equally
between the Front Left and Front Right channels. Multichannel sources are
downmixed to all remaining channels, but Mono to All and Stereo to All
options are disabled. Choosing Mono listening mode will first downmix the
multichannel source and output it to front left and right channels equally as a
dual mono signal.

Crossover Frequency

The Crossover Frequency sets the boundary below which the low frequency
signals from designated output channels are incorporated into Bass Management.
Low frequency signals are only taken from speakers that have been set to Small
(see Speaker size settings, above). The Bass Management signal is passed to the
subwoofer (if present) and speakers that have been set to Large (except for the
center speakers).
The crossover frequency can be adjusted within the range of 40 Hz to 250 Hz, with
a default setting of 100 Hz. Speakers set to small (see "Speaker size settings", on the
opposite page) will play only signals above the set frequency.
N The LFE information from a multi-channel source format is not affected by
the Crossover Frequency. The LFE info is mixed with low passed signals from
speakers set to Small after the Low Pass Filter is applied to those speakers.

Speaker delay settings

The speaker delay settings adjust the signal delay for each speaker individually
(from 0 to 100 ms). The default setting for each speaker is 0 ms. The two main
reasons to adjust the signal delay are:
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 adjustment delays the signals going to individual speakers:
the signal to the speaker farthest from the listener is not delayed while speakers
that are closer to the listener, are delayed more. This ensures that the sound from
each speaker reaches the listener at the same time.
Lip Sync Offset — Processing video signals often delays the video signal, relative
to the audio signal. The Lip Sync Offset delays audio signals to every output
channel by the same amount to compensate for the delay to the video signal and to
resynchronize the audio and video outputs.
If a particular setup requires both types of compensation, it is recommended that
the individual speaker's compensation delay is set first before readjusting all
speakers for Lip Sync offset.
N The total speaker delay (Compensation Delay + Lip Sync Offset) must not
exceed 100 ms.
To configure these settings using the SSP 7.1 Setup and Control Software, see
page 5-9.
SSP 7.1 • Setup 4-5