Yamaha DSP-Z9 - Manual (Page 103)

SOUND FIELD OPTIONS
101
English
ADDITIONAL
INFO
RMA
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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, 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 from 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 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.
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.
■ Sound field parameters (Stereo/Surround)
Use to select and adjust sound field parameters.
SOUND FIELD OPTIONS
What is a sound field
Item Features Page
DSP Level Adjusts the level of all the DSP effect sounds. 103
Init. Delay Adjusts the apparent distance from the source sound. 103
Room Size Adjusts the apparent size of the sound field. 103
Liveness Adjusts the reflectivity of the virtual walls in the hall. 104
Dialogue Lift Adjusts the height of the front and center channel sounds. 104
Rev. Time Adjusts the apparent size of the acoustic environment. 104
Rev. Delay
Adjusts the time difference between the beginning of the direct sound and the beginning
of the reverberation sound.
105
Rev. Level Adjusts the volume of the reverberation sound. 105
Sur. Delay Adjusts the delay between the front (left, right and center) signals and the surround signals. 105
Initialize Initializes the parameters of the sound field program. 105
Sur.Init.Delay Adjusts the delay between the direct sound and the first reflection in the surround sound field. 105
Sur.Room Size Adjusts the apparent size of the surround sound field. 105
Sur.Liveness Adjusts the apparent reflectivity of the virtual walls in the surround sound field. 105
SB Init.Delay Adjusts the delay between the direct sound and the first reflection in the surround back sound field. 105
00EN.00_DSPZ9_GB.book Page 101 Thursday, November 13, 2003 10:55 AM