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seven speaker channels, but your processor 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. T his is the most
common format for music and is also used on many movies. You may get stereo from any source - digital
or analog. Sound will normally come from the seven speaker chann els, but your proc essor can produce
stereo in one (mono) to seven channels (see “Audio Modes under Operation”).
Dolby Pro Logic - Dolby Pro Logic is a refinement of Dolby Surround, whic h was the earliest form of true
surround processing. Like Stereo, Dolby Surround contains two discrete, full range audio chann els. In
addition, a monaural, limited range surround channel is enc oded on the two s tere o channe ls i n a pr ocess
called matrixing. The surround channel information is encoded in positive polar ity on the left channe l and
in negative polarity on the right channel. The Dolby Processor can detect this e ncoding (lef t 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 fr om the left and right channel.
This is the most common format for all but the most recent movies. Music sources ar e 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 ster eo imaging, especially
when you are sitting away from the “sweet spot” at center of the listening area. The surround channe l
processing often lends a pleasing ambiance even to material that is not enc oded in Dolby Surround.
Dolby Pro Logic is fully compatible with stereo and you m ay get it from any sourc e - digital or analog.
Sound will normally come from all seven speakers in your system, but your processor c an produce s ound
in one (mono) to seven channels (see “Audio Modes under Operation”).
Dolby Digital - Dolby Digital contains up to five discrete, full range a ud io c h ann el s plus a n additional Low
Frequency Effects (LFE) channel. The LFE channel contains only low frequenc y inform ation for enhanced
sound effects in movies. This combination of five discrete channels p lus a LFE channel is often referred
to as 5.1 channels. Dolby Digital is a digital format only. It must be delivered to your processor over a
coaxial or optical digital cable. As of the writing of this manual, Dolby Digit al is comm ercially avail able 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 equipment. You can’t directly record D olb y Digita l onto m ini dis c
or digital compact cassette since these devices add their own compress ion, which is incompatible with
the Dolby Digital compression. Not all Dolby Digital recordings will include al l five channe ls, and, in f act, it
is common on DVDs to have two channel Dolby Digital with or witho ut Pro Logic proces sing. Sound will
normally come from all seven speakers in your system, but your proces sor 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 us es a special RF
encoding scheme to put the bitstream on Laser discs without replacing the normal stereo (or Dolby
Surround) PCM bitstream that is normally available from laser disc. In order to use Dolby Digit al RF laser
discs you must have a B&K DT-1 RF demodulator or similar product from another manufacturer. For best
results with your processors Plug and Play capability we recomm end the B&K DT-1.
Dolby Digital Surround EX - Dolby Digital Surround EX is a new movie sound track that grea tly
enhances the sense of spatial and positioning of the surround channel sound. This system was
developed jointly by Lucasfilm THX and Dolby Laboratories, using Lucas film’s idea of im proving spatial
expression and achieving a 360-degree sound positioning with D olby Laboratories’ matrix encoding
technology. The surround back channel is matrix-encoded and inserted into both Dolb y 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 Dolb y Digital decoder into SL, SR and SB
channels.
DTS (Digital Theater Systems) - DTS is similar to Dolby Digital in t hat it provides 5.1 discrete audio
channels. However, it uses more digital data to encode the information and ma y provide greater fidelity
than Dolby Digital. DTS is a digital format only. It must be delivered to your processor over a c oaxial or
optical digital cable. No RF demodulator is required for DTS laser discs since the DTS bitstream replaces
the normal PCM bitstream. Like Dolby Digital,