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DSP Presets
PLIIx Music
The PLIIx Music preset is designed to use the Pro
Logic IIx DSP processing mode to decode music
sources. It provides additional Width, Dimension,
and Panorama preset parameters to allow you to
adjust the soundfield.
PLII Music DSP preset parameters
Parameter Options What it changes
Steered All Steered Rear,
Steered Side,
Steered All
Which of the four
surround channels are
generated by steering.
Width 0 to 7 The centre spread,
where 0 is full centre
and 7 is full left and
right.
Dimension -3 to +3 The spatial soundfield,
where -3 puts the
balance to the rear of
the room and +3 puts it
to the front.
Panorama No, Yes Extends the front stereo
image to include the
surround speakers, to
give a wrap-around
effect.
Stereo and Direct
The Stereo preset passes the left and right input
signals directly to the left and right main speakers. Any
mono or front left and right subwoofers continue to be
used. With the Direct preset only the left and right main
speakers are used, bypassing any spatial processing
and bass management.
There are no additional DSP preset parameters for
Stereo and Direct.
PLIIx Movie and PLIIx THX
PLIIx Movie and PLIIx THX use the Dolby Pro Logic
IIx DSP processing mode, and are the recommended
choice for Dolby Surround encoded material. They also
give excellent results with two-channel sources not
specifically encoded for Dolby Surround, including two-
channel Dolby Digital sources.
Pro Logic IIx re-creates 7.1-channel movie surround
from the two-channel source, using improved
decoding techniques that preserve the directness of
the soundfield, resulting in enhanced image stability
compared with the original Pro Logic decoding.
Meridian’s implementation of Pro Logic IIx uses
proprietary code based on 48-bit precision to give
outstanding clarity.
The PLIIx THX DSP preset uses the same PLIIx
processing as PLIIx Movie, but adds THX Cinema
processing. THX is a set of standards and technologies
developed by Lucasfilm Ltd. with the aim of making
your experience of the film soundtrack as faithful as
possible to what the director intended.
Re-equalisation is used to restore the correct tonal
balance for watching a film soundtrack in a small home
environment. The information going to the surround
speakers is filtered so that it closely matches the tonal
characteristics of the sound coming from the front
speakers, to ensure seamless panning between the
front and surround speakers.
THX can also be used with the 5.1 Movie DSP
presets; see
THX
, page 33.