Extron Electronics SSP 7.1 User Guide - Manual (Page 24)

Listening Mode Settings
The SSP 7.1 provides a range of settings that refine the sound distribution for each listening
mode, depending on the decoding mode that has been selected.
Dolby Pro Logic II or IIx Music
Dimension control — This feature alters the ratio of L+R to L-R for two-channel input
signals, which adjusts the sound field towards the front or towards the back. The available
settings are Front, Neutral, or Back. The default setting is Neutral.
Center width control — Pro Logic decoding produces a single center signal that comes
from the center speaker. If there is no center speaker, a “phantom” center image is
produced that is split between the right and left speakers.
If right, left, and center speakers are present, center width control allows variable adjustment
of the center image so that is heard only from the center speaker, only from the right and
left speakers, or from all three speakers in varying degrees.
There are up to eight different settings, with each corresponding to a specific calculation
angle (Φ). When the setting is 0, the sound comes from the center speaker, when the setting
is 7, the sound is from the L/R speakers. The default setting is 3.
Control Position Calculation Angle
(Φ)
C Level (dB) L/R Level (dB)
0 0.0 0.0 Off
1 20.8 -0.6 -12.0
2 28.0 -1.1 -9.6
3 36.0 -1.8 -7.6
4 54.0 -4.6 -4.8
5 62.0 -6.6 -4.1
6 69.2 -9.0 -3.6
7 90.0 Off -3.0
NOTE: The level of the center speaker (C Level) is related to cosine Φ. The level of the
left and right speakers (L/R Level) is related to sine Φ.
Panorama control — This feature extends the center width control, so that all or part of
the center image can be heard from the surround speakers for a “wraparound” effect. The
feature may be On or Off. The default setting is Off.
DTS Neo:6 Music or Cinema
Center image control — The center image control varies the amount of attenuation
applied to the left and right channel information of the input source that is used for creating
the output center channel effects. When it is set to 0, the mixed input signal information,
intended for use in creating the center output channel of the DTS Neo:6 listening modes, is
filtered back to the front left and right output channels. This creates the effect of spreading
the centralized audio signal across all three front output channels. When this control is
set to 10, the matrixed information intended for the center output channel effects is fully
attenuated, allowing the center channel to create a more centralized effect from the front
channels.
The default setting for DTS Neo6: Music is 3. The default for DTS Neo6: Cinema is 10.
SSP 7.1 • Setup 18