Post-Processing - Classe Audio Sigma SSP Owner's Manual

post-processing

28
The first thing the Surround Sound Preamp/Processor does is recover the various
channels delivered by your source with accuracy and fidelity. This might be a
single-channel mono signal, a Dolby True HD soundtrack with 7.1 channels, or
anything in between. The signal may have been delivered via satellite receiver,
cable set-top box, Blu-ray Disc, or even downloaded from the Internet.
Once the SSP has decoded the selected signal, various time delay and level
offset adjustments are made to optimize the signal for playback on your system.
These are the most basic kinds of post processing. Others include tone control
and equalization as well as a variety of special post-processing modes the SSP
makes available. These additional post processing modes are particularly useful
for utilizing additional surround speakers with limited audio track sources. For
instance, processing a
2-channel stereo source with Dolby Pro Logic IIx can generate a 7.1-channel
output so that you can enjoy the audio source in full surround sound.
Note: Many movie soundtracks are recorded with 5.1 discrete channels, so post
processing is required in order for playback in a 7.1 channel system to utilize all
of the channels. Choosing Dolby PLIIx or DTS Neo6, for example, will generate
the extra rear channel signals necessary. Without post processing applied, only the
original 5.1 channels will play, leaving the rear channels silent.
Table 2: Modes
Name
Mono
Stereo
Party
Mono Plus
# Channels
1 Combines all channels to a single
Monaural channel for playback
through the Center speaker or,
lacking a Center, a mono signal
shared equally between Front Left
& Right.
2 Combines all left channel signals
into a single left channel signal for
playback from the Front Left and
similarly combines all right channel
signals for playback from the Front
Right. The center channel signal is
divided equally between Front L
& R.
up to 7.1 Combines all channels for playback
from all speakers in the selected
configuration. This mode is
intended to more or less evenly fill
the room with sound for situations
where no sweet-spot listening is
required.
up to 7.1 Combines all channels to a single
Monaural channel for playback
through all channels in the selected
configuration. Levels are adjusted
for each speaker group (surrounds,
rears, center) to create a balanced
playback mix.
Comments