seven speaker channels, but your receiver can produce mono in one to seven channels (see “Audio
Modes under Operation”). Since all modern sources are stereo, the mono information is usually replicated
from both the left and right channels.
Stereo - Stereo contains two discrete, front left and right full range audio channels. This is the most
com m on for m at for mus ic and is als o used on m any movies. You may get stereo from any source - digital
or analog. Sound will normally come from the seven speaker channels, but your receiver can produce
stereo in one (mono) to seven channels (see “Audio Modes under Operation”).
Dolby Pro Logic - Dolby Pro Logic is a refinem ent of Dolby Surround which was the earliest f orm of tr ue
surround processing. Like Stereo, Dolby Surround contains two discrete, full range audio channels. In
addition, a m onaural, lim ited range sur round channel is encoded on the two stereo channels in a proc ess
called m atrixing. The surround channel inform ation is encoded in positive polarity on the left channel and
in negative polarity on the right channel. The Dolby Processor can detect this encoding (left minus right)
and send that information to the surround channels. Dolby Pro Logic adds additional processing to
produce a full range center channel by extracting the mono information from the left and right channel.
This is the most common format for all but the most recent movies. Music sources are occasionally
encoded in Dolby Surround. However, many people prefer to use Pro Logic processing on all of their
stereo sources. The center channel extraction process often yields improved stereo imaging, especially
when you are sitting away from the “sweet spot” at center of the listening area. The surround channel
process ing of ten lends a pleasing am bianc e even to m ater ial that is not encoded in Dolby Surround. Dolby
Pro Logic is f ully compatible with stereo and you may get it from any source - digital or analog. Sound will
normally come from all seven speakers in your system, but your receiver can produce sound in one
(mono) to seven channels (see “Audio Modes under Operation”).
Dolby Digital - Dolby Digital contains up to five discrete, f ull range audio channels plus an additional Low
Frequency Effects (LFE) channel. T he LFE c hannel contains only low frequency information for enhanced
sound eff ec ts in m ovies . This com bination of five discrete channels plus a LFE channel is often referred to
as 5.1 channels. Dolby Digital is a digital form at only. It must be delivered to your receiver over a coaxial
or optical digital cable. As of the writing of this m anual, Dolby Digital is commerc ially available on DVD and
Satellite (Also see

Dolby Digital RF

below). It is also possible to create your own Dolby Digital CDs and
DATs if you have the recording equipm ent. You can’t directly record Dolby Digital onto m ini disc or digital
compact cassette since these devices add their own compression which is incompatible with the Dolby
Digital compression. Not all Dolby Digital recordings will include all five channels, and, in fact, it is
common on DVDs to have two channel Dolby Digital with or without Pro Logic processing. Sound will
normally come from all seven speakers in your system, but your receiver can produce sound in one
(mono) to seven channels (see “Audio Modes under Operation”).
Dolby Digital RF - Dolby Digital RF is identical to normal Dolby Digital except that it uses a special RF
encoding scheme to put the bitstream on Laser discs without replacing the normal stereo (or Dolby
Surround) PCM bitstream that is norm ally available from las er disc. In order to use Dolby Digital RF laser
discs you must have a B&K DT -1 RF dem odulator or sim ilar product from another m anufacturer. For best
results with your receivers Plug and Play capability we recommend the B&K DT-1.
Dolby Digital Surround EX - Dolby Digital Surround EX is a new movie sound track that greatly
enhances the sens e of s patial and pos itioning of the s ur round c hannel s ound. This system was developed
jointly by Lucasfilm THX and Dolby Laboratories, using Lucas film’s idea of improving spatial expression
and achieving a 360 degree sound positioning with Dolby Laboratories’ matrix encoding technology. The
surround bac k channel is matrix- enc oded and inser ted into both Dolby Digital SL (surround left) and Dolby
Digital SR (surround right) channels. Upon playback, the signals may be decoded by a high precision
digital matrix decoder within the Dolby Digital decoder into SL, SR and SB channels.
DTS (Digital Theater Systems) - DTS is similar to Dolby Digital in that it provides 5.1 discrete audio
channels. However, it uses more digital data to encode the information and may provide greater fidelity
than Dolby Digital. DTS is a digital format only. It must be delivered to your receiver over a coaxial or
optical digital cable. No RF demodulator is required for DT S laser discs since the DTS bitstream replaces
the normal PCM bitstream. Like Dolby Digital,
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