Yamaha 376 User Manual

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What really creates the rich, full tones of a live instrument 
are the multiple reflections from the walls of the room. In 
addition to making the sound live, these reflections enable 
us to tell where the player is situated as well as the size 
and shape of the room in which we are sitting.
There are two distinct types of sound reflections that 
combine to make up the sound field in addition to the 
direct sound coming straight to our ears from the player’s 
instrument.

Reflected sounds reach our ears extremely rapidly (50 ms 
to 100 ms after the direct sound), after reflecting from one 
surface only (for example, from a wall or the ceiling). 
Early reflections actually add clarity to the direct sound.

These are caused by reflections from more than one 
surface (for example, from the walls, and the ceiling) so 
numerous that they merge together to form a continuous 
sonic afterglow. They are non-directional and lessen the 
clarity of the direct sound.

Direct sound, early reflections and subsequent 
reverberations taken together help us to determine the 
subjective size and shape of the room, and it is this 
information that the digital sound field processor 
reproduces in order to create sound fields.

If you could create the appropriate early reflections and 
subsequent reverberations in your listening room, you 
would be able to create your own listening environment. 
The acoustics in your room could be changed to those of a 
concert hall, a dance floor, or a room with virtually any 
size at all. This ability to create sound fields at will is 
exactly what YAMAHA has done with the digital sound 
field processor.

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Since the Dolby Surround and DTS systems were 
originally designed for use in movie theaters, their effect 
is best felt in a theater having many speakers designed for 
acoustic effects. Since home conditions, such as room 
size, wall material, number of speakers, and so on, can 
differ so widely, it is inevitable that there are differences in 
the sound heard. Based on a wealth of actually measured 
data, YAMAHA CINEMA DSP uses YAMAHA original 
sound field technology to combine Dolby Pro Logic, 
Dolby Digital and DTS systems to provide the audiovisual 
experience of a movie theater in the listening room of your 
own home.

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YAMAHA has developed a natural, realistic sound effect 
DSP algorithm for headphones. Parameters for 
headphones have been set for each sound field so that 
accurate representations of all the sound field programs 
can be enjoyed on headphones.

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YAMAHA has developed a Virtual CINEMA DSP 
algorithm that allows you to enjoy DSP sound field 
surround effects even without any surround speakers by 
using virtual surround speakers. It is even possible to 
enjoy Virtual CINEMA DSP using a minimal two-speaker 
system that does not include a center speaker.

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Sound output from each speaker depends on the type of 
audio signals being input. Refer to the diagrams in the 
table below to understand the speaker layout for each 
sound field program. For details about the sound output 
from each speaker in sound field programs, refer to 
“SOUND OUTPUT IN EACH SOUND FIELD 
PROGRAM” in “APPENDIX” at the end of this manual.

Be advised that there may be no or not enough sound output from 
speakers depending on the type of input source being played 
back. Furthermore, there may be some channels that can only be 
used partially when they are adjusted to specific aspects of 
movies, such as special sound effects, etc.

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Except for “2ch Stereo”, “7ch Stereo”, and “STRAIGHT”, you 
can select a decoder to output sound from the surround back 
speakers (see page 47).