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APPENDIX ➤ Basic Knowledge of Surround Sound En 69
What is Surround Sound?
Surround sound offers the sense of being surrounded by sounds, an
experience common in concert halls and movie theaters. This can be
achieved by surrounding the audience with numerous speakers from
which sound is output uniformly in all directions. This “surround
sound” technology immerses the listener in sound with speakers
positioned not only in front of the listener, but also behind and to the
sides of the listener, making him or her feel as if they are actually in
the situation.
For precise directional control and quality of sound reproduction,
sounds must be split into separate audio channels for output to each
speaker. Surround sound systems for regular home use (5.1-channel
speaker systems) produce surround sound using five speakers and
a subwoofer, as shown below:
As explained above, sounds can be reproduced for a great sense of
presence by installing multiple speakers. However, this can be
difficult to do in a living room. This unit utilizes “digital sound
projector” technology to provide a realistic and engaging surround
sound experience using only a slim center unit and subwoofer.
What is a Digital Sound Projector?
A digital sound projector separately controls compact speakers
installed in orderly rows, so that optimized audio signals are output
from each speaker and synthesized as highly focused sounds
(sound beams).
When these focused sounds hit a hard wall, they are reflected off of
the wall. A digital sound projector outputs sound beams from five
channels, including front (left/right), center, and surround (left/right)
channels, by reflecting these beams off of walls so that sounds reach
the listener from the appropriate direction. It features a technology
that enables true surround sound without requiring the installation of
speakers in front of, or behind, the listener.
Yamaha’s Audio Technologies
This unit features many more functions based on Yamaha’s superior
audio technologies.
This technology enhances and extends bass and treble, which tend
to be weak in digitally compressed formats such as MP3 used with
portable digital audio players and computers. This makes
compressed audio sound more musically dynamic.
With this unit, Compressed Music Enhancer is automatically
activated when audio is input from a Bluetooth device.
This technology enables precise digital recreation of actual acoustic
environments found in well-known concert halls and movie theaters.
This is achieved using Yamaha’s exclusive sound field programs,
which are based on data measured in various sound fields, and with
which the amplitude, depth, and volume of sounds have been
adjusted.
This technology enables clear playback of speech (dialog,
narrations, etc.) while maintaining the quality of background sound
(music, sound effects, etc.). It enhances the acoustic characteristics
of speech sounds and increases the perceived volume level.
Basic Knowledge of Surround Sound
Typical 5.1 channel speaker system
Front speakers
Subwoofer
Surround speakers
Center
speaker
Digital amplifier
Speaker
Sound beams are emitted
in the target direction
Compressed Music Enhancer
CINEMA DSP
Clear Voice
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