Yamaha RX-V390RDS - Manual (Page 26)

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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.
By employing a four-channel system, the Dolby Pro Logic
Surround system divides the input signals into four levels: the
left and right main channels, the center channel (to
characterize dialog), and the rear surround-sound channels (to
characterize sound effects, background noise and other
ambient noise).
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 system in 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 Canadian patent
number 1,037,877. “Dolby”, “Pro Logic”, and the double-D
symbol are trademarks of Dolby Laboratories Licensing
Corporation.
Description of Each Sound Field Program
The following list gives brief descriptions of the sound fields produced by each of the DSP programs. Keep in mind that some of
these are precise digital recreations of actual acoustic environments. The data for them was recorded at actual places using
sophisticated sound field measurement equipment.
Note
The channel level balance between the left rear effect speaker and the right rear effect speaker may vary depending on the
sound field you are listening to. This is due to the fact that some of these sound field recreations are actual acoustic
environments.
PROGRAM
PRO LOGIC
3 STEREO
ROCK
HALL
FEATURE
This program is effective for playback of sources encoded with Dolby Surround.
The employment of the digital signal processing system improves crosstalk and transfers the sound source more
smoothly and precisely, compared to the conventional type. A stable movie sound field is recreated.
This program is effective not only for playback of sources encoded with Dolby Surround, but also for
sources not encoded with Dolby Surround or TV programs with encode 2-channel stereo sound. With this
program, 2-channel stereo sound is converted into 3-channels (left front, center and right front), so the
dialogs are emphasized on the center position by the use of the center speaker. As no sound is output from
the rear speakers, this program is also effective in a simple Audio/Video system without rear speakers.
This program is suitable for rock music. A big, powerful sound is reproduced lively and dynamically.
In this program, the center seems deep behind the front speaker pair, creating an expansive, large hall
ambience.