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Yamaha RX-V630RDS Manual

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BASIC
OPERATION
29
English
INTRODUCTION PREPARATION
ADVANCED
OPERATION
ADDITIONAL
INFORMATION
APPENDIX
DIGITAL SOUND FIELD PROCESSING (DSP)
Understanding sound fields
A sound field is defined as the “characteristic sound reflections of a
particular space.” In concert halls and other music venues, we hear
early reflections and reverberations as well as the direct sound
produced by the artist(s). The variations in the early reflections and
other reverberations among the different music venues is what gives
each venue its special and recognizable sound quality.
YAMAHA sent teams of sound engineers all around the world to
measure the sound reflections of famous concert halls and music
venues, and collect detailed sound field information such as the
direction, strength, range, and delay time of those reflections. Then
we stored this enormous amount of data in the ROM chips of this
unit.
■ Recreating a sound field
Recreating the sound field of a concert hall or an opera house requires localizing the virtual sound sources in your
listening room. The traditional stereo system that uses only two speakers is not capable of recreating a realistic sound
field. YAMAHA’s DSP requires four effect speakers to recreate sound fields based on the measured sound field data.
The processor controls the strength and delay time of the signals output from the four effect speakers to localize the
virtual sound sources and fully encompass the listener.
Hi-Fi DSP programs
The following list gives you a brief description of the sound fields produced by each of the DSP programs. Keep in
mind that most of these are precise digital recreations of actual acoustic environments.
No.
1
2
3
4
Program
CONCERT HALL
JAZZ CLUB
ROCK CONCERT
ENTERTAINMENT/
Disco
ENTERTAINMENT/
6ch Stereo
Features
A large round concert hall with a rich surround effect. Pronounced reflections from all directions
emphasize the extension of sounds. The sound field has a great deal of presence, and your virtual
seat is near the center, close to the stage.
This is the sound field at stage front in “The Bottom Line”, a famous New York jazz club, that
seats up to 300 people. Its wide left to right seating arrangement offers a real and vibrant sound.
The ideal program for lively, dynamic rock music. The data for this program was recorded at
LA’s “hottest” rock club. The listener’s virtual seat is at the center-left of the hall.
This program recreates the acoustic environment of a lively disco in the heart of a big city. The
sound is dense and highly concentrated. It is also characterized by a high-energy, “immediate”
sound.
Using this program increases the listening position range. This is a sound field suitable for
background music at parties, etc.
0106V630_29-33_EN(GB) 1/11/02, 7:41 PM29
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