Dolby Pro Logic Ii/Iix Movie Or Music; Dimension Control; Center Width Control; Panorama Control - Extron electronics SSP 7.1 User Manual

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Dolby Pro Logic II/IIx Movie or Music

Dolby Pro Logic II builds on Dolby Pro Logic by breaking the mono side surround
channel into a pair of stereo side surround channels for playback in a 5.1 surround
sound setup. This is achieved by a matrix surround decoder.
Dolby Pro Logic II only works with 2-channel source formats that are
used in a 5.1 configuration. It is available as Dolby Pro Logic II Movie and
Dolby Pro Logic II Music.
Dolby Pro Logic II Movie is used for VCRs, TV broadcasts, and all programs
encoded in Dolby Surround. Dolby Pro Logic II Music is used for any stereo music
recordings.
Dolby Pro Logic IIx Movie and Music extend the Dolby Pro Logic II matrix
decoding technology to derive up to seven channels from a two channel source,
which provides additional outputs for surround back channel effects.
Both the Movie and Music modes produce up to seven full bandwidth matrixed
channels. Music mode has hard back effects (shared across all surround speakers)
instead of just the back speakers, which the Movie mode has.
Dolby Pro Logic II/IIx Music mode provides an additional set of commands to
tailor the sound to individual listening tastes:

Dimension Control

This alters the ratio of L+R to L-R for two-channel input signals. This has the effect
of adjusting the sound field towards the front or towards the back, making the
sound more or less spacious.

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. Center Width Control allows variable
adjustment of the center image so it is heard only from the center speaker, only
from the right and left speakers, or from all three speakers in varying degrees.

Panorama Control

This 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.

Dolby Digital Pro Logic IIx Movie or Music

This mode builds on the Dolby Pro Logic IIx matrix mixing technology, to create
up to two additional surround back channels from the original Dolby Digital 5.1
channel information. In Dolby Pro Logic IIx Movie mode, two additional channels
(right and left back) are produced. In Dolby Pro Logic IIx Music mode, a single
additional center back channel is produced. The Dolby Digital Pro Logic IIx Music
mode uses the same Dimension, Center Width, and Panorama controls that are
available for Dolby Pro Logic IIx Music mode (see the section above).
N This listening mode is only available when the SSP 7.1 is set up for 6.0 to 7.1
N Dolby Pro Logic IIx Movie and Dolby Digital EX are electronically equivalent
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channel outputs and a multichannel Dolby Digital source format is present.
when the system is set up for 6.1.