Yamaha RX-V765BL Owner's Manual page 48

Editing surround decoders/sound field programs
Time
Sound source
Small = 0.1
■
Parameters for defining attenuation
characteristics of early-reflected sound
Parameter
Liveness
S.Liveness
SB Liveness
Adjust the attenuation of reflected sound. You can create a
lively sound field (with a high reverberant sound level) as
you increase the value, and a dead sound field (with a low
reverberant sound level) as you decrease the value.
Creating either a lively sound field or a dead sound field in
an actual music hall is determined by the acoustic
absorption characteristics of reflection surfaces. A dead
sound field is created when the attenuation time is short
while a lively sound field is created when the attenuation
time is long.
Dead
Time
Small reflected
sound
Small = 0
■
Parameters for adjusting reverberant sound
Parameter
Rev.Time
Rev.Delay
Rev.Level
44
En
Source sound
Early reflections
Time
Large = 2.0
Adjustable range
0 to 10
0 to 10
0 to 10
Source sound
Live
Time
Large reflected
sound
Large = 10
Adjustable range
1.0 to 5.0s
0 to 250ms
0 to 100%
Rev.Time parameter adjusts the attenuation time of the
rear reverberant sound based on the time that about 1kHz
reverberant sound takes for 60dB of attenuation.
Reverberant sound attenuates faster as you decrease the
value. Rev.Time adjustment allows you to create a natural
reverberant sound, by setting the attenuation time longer
for a sound source or room with less echo, or shorter for a
sound source or room with more echo.
Rear reverberation
60dB
Time
Rev.Time
Short
reverberation
Sound source
Small = 1.0s
Rev.Delay parameter adjusts the time difference between
the beginning of the direct sound and the beginning of the
reverberation sound. The larger the value, the later the
reverberation sound begins. Increasing the value of
Rev.Delay allows you to create a reverberant sound in a
wider area for the same Rev.Time.
Source sound
(dB)
Reverberation
Rev.Delay
Rear
Source sound
reverberation
Early reflections
60dB
Time
Rev.Time
Long
reverberation
Large = 5.0s
60dB
Time
Rev.Time