Surround Reference - Cambridge SoundWorks DTT3500 Digital User Manual

balanced output level with the left
and right satellites (which provide a
fixed "reference" output level).
All functions except for the level
controls are disabled while the test
sound is running.
The speaker level controls operate
at all times. If desired, you may
adjust these controls during program
material to fine-tune the balance.
(This function is only available on
the Remote Control)
Note: Volume levels during the test
sequence are lower than during
normal operation.
DYNAMIC MODE:
12. Press
this button to experience the full
dynamic range of Dolby Digital
programs. The LEDs on the
upper half of the Decoder
Amplifier light up momentarily.
The program source will sound
louder in Dynamic Mode. If you
press this button again, the
default mode (compressed)
resumes. The LEDs on the lower
half of the Decoder Amplifier
light up momentarily.
(This function is only available
on the Remote Control)

Surround Reference

Dolby Digital
Dolby Digital (earlier called AC-3)
delivers five discreet full-range
channels (left front, center, right
front, left surround and right
surround) plus a separate Low
Frequency Effects (LFE) channel.
Many soundtracks on the latest
generation laser discs, DVDs and
High Definition Television (HDTV),
are encoded with Dolby Digital
technology.
When a 5.1-channel Dolby Digital
program source is playing, such as
from a Creative PC-DVD player,
DVD player or game console, the
Dolby Digital indicator light will
illuminate automatically.
Note: Not every section of a DVD
will be 5.1-channel encoded. On
many DVDs, only the main movie
program will be available in 5.1-
channel sound. Other supporting
chapters (like a "Director's
Comment" section) may be in stereo
or mono. These sections will not
light the Dolby Digital indicator even
though the sound will be properly
reproduced by the DTT3500 Digital.
Dolby Pro Logic
Dolby Surround is an earlier
surround sound standard which is
decoded with a Pro Logic processor
in the DTT3500 Digital. The Pro
Logic steering circuitry derives
separate center and rear channels
from encoded stereo program
sources.
Pro Logic processing provides a
convincing movie soundfield when
the material is specifically encoded
for Dolby Surround. Most older
stereo movie soundtracks will only
be encoded for Dolby Surround,
even though the program source may
be a DVD's digital output. Most
DVDs containing Dolby Surround
program material will cause both the
Dolby Digital and Dolby Pro Logic
lights to illuminate. DTT3500
Digital will decode these digitally
transferred Dolby Surround
programs through the digital Pro
Logic decoder automatically.
CD-ROMs and CDs with Dolby
Surround encoding will feature the
Dolby Surround logo at the
beginning of the program or on the
packaging.
Process these programs by
selecting Analog In using the Dolby
Pro Logic button for input through
Analog Line In.
If using Digital DIN input, ensure
that the Digital DIN on the Dolby
Digital/PCM Audio input is selected.
Then select Digital In using the
Dolby Prologic button.
When Dolby Pro Logic is selected
CMSS is turned off. To turn on
CMSS again, turn off Dolby Pro
Logic first.
Do not select a Pro Logic decoding
mode if the program material is not
encoded for Dolby Surround.
Excessive center channel output will
result, and most of the stereo effect
will be lost. Use CMSS "Movie" or
"Music" modes to upmix stereo
programs to a realistic 5.1-channel
sound field.
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