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What really creates
the rich, fidl tones of a live instrument
are the multiple
reflections
l}om 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.
•
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),
after reflecting
fi'om one
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
surl:ace
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
infommtion
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 virtually
any size room at
all. This ability to create sound fields at will is exactly
what YAMAHA
has done with the digital sound field
processor.
You 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.
1
Press AMP.
2
Select the sound field program you want to
adjust.
3
Press
u / d to select
the parameters.
4
Pressj
/ i to change
the parameter
value.
Y
If you press and hold J
to change the parameter value, the
front panel display automatically
stops at the l:actory preset
parameter moentaril?:
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