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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. YAMAHAs 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 in a full circle around 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
CONCERT HALL 1
CONCERT HALL 2
CHURCH
Europe Hall A
Europe Hall B
U.S.A. Hall C
Live Concert
Freiburg
Royaumont
Features
This is a large fan-shaped concert hall with approximately 2500 seats.
There is relatively little reflection from the walls, and sound spreads
finely and beautifully.
This is a large shoe-box type concert hall with less than 2400 seats
located in Frankfurt. This hall has a very solid, powerful sound. The
listeners virtual seat is in the center-right section on the first floor.
This is a large 2600 seat concert hall in the United States which features
a fairly traditional European design. The middle and high frequencies
are richly and beautifully reinforced.
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 program recreates the acoustic environment of a big church located
in south Germany. The reverberation delay is very long while the early
reflections are smaller than with other sound field programs.
This program features the sound field created by the refectory (dining
hall) of a beautiful medieval Gothic monastery located in Royaumont on
the outskirts of Paris.
Program
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