Yamaha RX-V750 Owner's Manual page 77

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, and the size
and shape of the room in which we are sitting.
Yon can enjoy good quality sound with the factory preset
parameters. Although you do not have to change the initial
settings, you can change some of the parameters to better
suit the input source or your listening room.
• Elements of a sound field
In any environment, in addition to the direct sound coming
straight to our ears from the player's instrument, there are
two distinct types of sound reflections that combine to
make up the sound field:
Early reflections
Reflected sounds reach our ears extremely rapidly (50 ms
- 100 ms after the direct sound), alter reflecting from one 1
surface only for example, from the ceiling or a wall.
Early reflections actually add clarity to the direct sound.
Reverberations
These are caused by reflections from more than one
surface walls, ceiling, the back of the room 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
reverberation 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.
3
If you could create the appropriate early reflections and
subsequent reverberations in your listening room, you
woukt 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 virtually any size room at
all. This ability to create sound fields at will is exactly
what YAMAHA has done with the digital sound fiekt
processor.
5-
......
4
-2
-3
1 Press AMP.
Turn on the video monitor and
press ON SCREEN repeatedly ........
to select the full display
mode.
Select the sound field program you want to
adjust.
_i _ _ _uvs_ EmERT_n TWHm _aOWE
a_ts P_nEDI_E__HT
Program No. Program name
m
D'_O iiLk.liE. ' ,N_H{_.
Cursor _ .÷ Ge_,,__,1
E:,::.F' LEiJEL , _, ,CI,dB
F',, i HIT_I)L',',, !Si,_:_
F'. ROOIq 5; ZZ E), 1 ,,0
5,, !i4!T,,
[:,L','= =2€_h:
5., F,:!; n H SIZE;,, i ,,_71
Parameters Parameter values
I
73