Yamaha AV-90PY Gebruikershandleiding - Pagina 17

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Notes on Operation of Sound Field Programs

In the CONCERT VIDEO, MONO MOVIE, ROCK CONCERT

and CONCERT HALL, no sound is heard from the center

speaker.

When the monaural sound source is played in the DOLBY

PRO LOGIC or ENHANCED, no sound is heard from the

front speakers and the rear speakers. Sound is heard only

from the center speaker. However, if the center mode is in

the PHANTOM, the front speakers output the sound of the

center speaker.

Description of Dolby Pro Logic Surround

DOLBY PRO LOGIC SURROUND: This unit employs the

Dolby Pro Logic Surround system. This system is similar to

professional Dolby Stereo decoders used in movie theaters.

The Dolby Pro Logic Surround system, by employing a four-

channel system, divides the input signals into four levels: the

left and right main channels, the center channel (to characterize

dialogue), and the rear surround-sound channels (to

characterize sound effects, background noise and other ambient

noise).

If you connect an external amplifier to this unit, see if it has a

built-in surround sound or ambience circuitry. If it does, then

be sure that the surround or ambience circuitry on that

amplifier is off while you are using the digital sound field

processor's Dolby Pro Logic Surround decoding function.

When this unit is in the Dolby Pro Logic Surround mode, if

the main-source sound is considerably altered by

overadjustment of the BASS or TREBLE controls, the

relationship with the center and rear channels may produce

an unnatural effect.

Dolby Surround is encoded on the sound track of commercially

available video cassettes and video discs as well. When you

play a source encoded with Dolby Surround on your home video

system, the Dolby Pro Logic Surround mode on this unit

decodes the signal and feeds the surround-sound effects.

The Dolby Pro Logic Surround mode may not be always

effective on video sources not encoded with Dolby Surround.

Manufactured under license from Dolby Laboratories Licensing

Corporation. Additionally licensed under one or more of the

following patents: U.S. numbers 3,632,886, 3,746,792, and

3,959,590; canadian numbers 1,004,603 and 1,037,877.

"Dolby" and the double-D symbol are trademarks of Dolby

Laboratories Licensing Corporation.