Yamaha RX-V765 - Инструкция (Страница 46)

44
En
Editing surround decoders/sound field programs
■ Parameters for defining attenuation
characteristics of early-reflected sound
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.
■ Parameters for adjusting reverberant sound
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.
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.
Parameter Adjustable range
Liveness
S.Liveness
SB Liveness 0 to 10
0 to 10
0 to 10
Parameter Adjustable range
Rev.Time
Rev.Delay
Rev.Level 1.0 to 5.0s
0 to 250ms
0 to 100%
Time
Le
vel
Le
vel
Time
Early reflections
Source sound
Sound source
Small = 0.1 Large = 2.0
Time
Le
v
e
l
Small = 0 Large = 10
Time
Le
v
e
l
Source sound
Live
Dead
Large reflected
sound
Small reflected
sound
Time Time
Small = 1.0s Large = 5.0s
Source sound
Rear reverberation
Rear
reverberation
Early reflections
Short
reverberation Long
reverberation
Sound source
Rev.Time Rev.Time
60dB 60dB
Time
L
e
vel
Source sound
Reverberation
(dB)
Rev.Delay Rev.Time
60dB