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Yamaha AV-90PY Owner's Manual: Profile Of This Unit

Natural sound digital sound field processing amplifier 5 speaker configuration.
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You are the proud owner of Yamaha AV-90PY, the stereo amplifier –an extremely sophisticated audio component. The Digital
Sound Field Processor (DSP) built in this unit takes full advantage of Yamaha's undisputed leadership in the field of digital audio
processing to bring you a whole new world of listening experiences. Follow the instructions in this manual carefully when setting up
your system, and this unit will sonically transform your room into a wide range of listening environments –movie theater, concert
hall, and so on. In addition, you get incredible realism from Dolby-encoded video sources using the built-in Dolby Pro Logic
Surround Decoder.
Rather than tell you about the wonders of digital sound field processing, however, let's get right down to the business of setting up
the system and trying out its many capabilities. Please read this operation manual carefully and store it in a safe place for later
reference.
Digital Sound Field Processing
What is it that makes live music so good? Today's advanced
sound reproduction technology lets you get extremely close to
the sound of a live performance, but chances are you'll still
notice something missing: the acoustic environment of the live
concert hall. Extensive research into the exact nature of the
sonic reflections that create the ambience of a large hall has
made it possible for Yamaha engineers to bring you this same
sound in your own listening room, so you'll feel all the sound of
a live concert.
Dolby Pro Logic Surround
The Dolby Pro Logic Surround Decoder program lets you
experience the dramatic realism and impact of Dolby Surround
movie theater sound in your own home. Dolby Pro Logic gets
its name from its professional-grade steering logic circuitry,
which provides greater effective channel separation for a much
higher degree of realism than the "passive" Dolby Surround
circuits found in today's typical home audio/video equipment.
Dolby Pro Logic Surround provides a true center channel, so
that there are four independent channels, unlike passive Dolby
Surround which has in effect only three channels: left, right,
and rear. This center channel allows listeners seated in even
less-than-ideal positions to hear the dialog originating from
action on the screen while getting a stereo effect as well.
"ENHANCED" Dolby Pro Logic Surround
The AV-90PY has a second mode of Dolby Pro Logic Surround
processing called "Enhanced Dolby Pro Logic Surround"
processing. Enhanced Dolby Pro Logic Surround processing
recreates the surround effect of a movie theater, effectively
duplicating their multiple surround loudspeaker system,
completely surrounding the listener with the sounds of the
action taking place on the screen.
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PROFILE OF THIS UNIT

What's more, our technicians, armed with sophisticated
measuring equipment, have even made it possible to capture
the acoustics of a variety of actual concert hall, theater, etc. to
allow you to accurately recreate one of several actual live
performance environments, all in your own home.
This Dolby Pro Logic Surround Decoder employs a digital
signal processing system. This system increases sound
stability at each channel and minimizes crosstalk between
channels, compared to conventional analog Dolby signal
processing.
In addition, this unit features a built-in automatic input balance
control. This circuit always presents you the best surround
conditions without performing manual adjustments.

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