ATI Amplifier Technologies ATP8700 - Manual (Page 10)

Dolby Pro Logic IIx
Dolby Pro logic IIx is the latest version of Dolby’s Pro Logic
technology. Pro Logic II is a substantial improvement over the
original Pro Logic process; Pro Logic IIx is a new 7.1-channel
version of Pro Logic II. It can be employed only when back
surround speakers are connected. Otherwise, the A/V PROCESSOR
will provide only standard Pro Logic II processing.
The Pro Logic IIx Movie mode is intended for Dolby
Surround-encoded movie and TV soundtracks. It also works
well for video games, especially those encoded in Pro Logic II.
Use this mode for VHS tapes, standard TV broadcasts, and
DVDs encoded in Dolby Digital 2.0.
The Pro Logic IIx Music mode converts stereo music into
surround sound. Use it with any stereo music source,
including CDs, FM radio, and MP3 players.
Pro Logic IIx processing can also be applied to 5.1-channel
material, either Dolby Digital or DTS, to create 7.1-channel
surround sound.
DTS
This format is similar to Dolby Digital, but uses a higher
sampling rate. In its standard form, DTS provides 5.1-channel
surround sound. It is available on CD, DVD, laserdiscs,
PlayStation 2 video games, and D-VHS tapes. Audio-only DTS
discs may be used with any CD, DVD, or laserdisc player with
a digital audio output, but DVD discs with DTS audio must be
used on players with the “DTS Digital Out” logo.
DTS-ES
DTS-ES is an extension of the original DTS format that adds
an additional back surround channel to a soundtrack. DTS
ES-Matrix titles provide the sixth channel by a matrix process,
while DTS ES-Discrete media delivers a true, discrete back
surround channel. Both DTS ES formats are backward
compatible with the original DTS process, and will deliver a
5.1-channel output when no center or back surround speakers
are available.
The A/V PROCESSOR will automatically sense the availability
of either DTS ES format and automatically switch the
processing mode when required.
DTS Neo:6
This processing mode can create up to six full-bandwidth
channels from any matrix-encoded 2-channel source. It offers
two modes, Cinema and Music. Use the Cinema mode for
movie soundtracks, the Music mode for stereo music.
Surround Format Information
The A/V PROCESSOR incorporates today’s most advanced
surround-sound technologies, including variants of Dolby
and DTS surround sound. Available processing technologies
include Dolby Digital, Dolby Digital EX, Dolby Pro Logic IIx
Movie and Music modes, DTS, DTS ES-Matrix and ES Discrete,
DTS Neo:6, It also offers 5-Channel Stereo and 7-Channel
Stereo modes.
You may note that the A/V PROCESSOR includes fewer
surround-sound modes than many other surround processors,
such as “stadium,” “concert hall,” “jazz club,” etc. This was a
conscious omission on our part—we consider such modes
artificial-sounding and useless. Our customers have told us
they don’t use them, either, and would rather not have to
scroll past them when selecting surround-sound modes.
If you want to hear surround sound from stereo sources, you
will achieve the best results by using Dolby Pro Logic II or
DTS Neo:6.
The table on the next page lists the surround processing
choices available within each mode. Depending on the selected
source (analog or digital) and your loudspeaker configuration,
certain processing options may not appear or operate.
IMPORTANT NOTE:
THE A/V PROCESSOR AUTOMATICALLY SENSES
AND SETS THE SURROUND MODE OF THE
SELECTED SOURCE. ANY DESIRED CHANGES,
FOR EXAMPLE: DOLBY DIGITAL SURROUND TO DTS-ES
MUST BE MADE AT THE SOURCE DEVICE (IF AVAILABLE).
Dolby Digital
This digital audio format provides 5.1-channel surround
sound Dolby Digital source material includes DVDs, digital TV
broadcasts, many PlayStation 2™ video games, all XBox™
video games, laserdiscs, some satellite-delivered and digital
cable programming, and D-VHS tapes.
Dolby Digital EX
Movie soundtracks encoded with Dolby Digital Surround EX
contain an extra back surround channel, added to the
soundtrack during mixing, which places audio behind the
listener. This additional channel provides more detailed
imaging behind the listener, enhancing depth, ambience, and
sound localization. One or two additional surround speakers
may be used. A list of movies EX-encoded movies can be
found on the Dolby web site, www.dolby.com.
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