Yamaha DSP -A780 Operation Manual page 38

REV. TIME (Reverberation Time)
How it Affects the Sound:
The natural reverberation time of a room depends primarily on its
size and the characteristics of its inner surfaces. This parameter,
therefore, changes the apparent size of the acoustic environment
over an extremely wide range.
What it Does:
Adjusts the amount of time it takes for the level of the dense,
subsequent reverberation sound to decay by 60 dB (@ 1 kHz).
Control Range:
1.0 – 5.0 seconds.
The reverb time in a small-to-medium size hall would be between
1 and 2, and in a large hall it is normally between 2 and 3.
Direct sound
Level Level
Small
60 dB
Time
REV. TIME
Reverberations Reverberations
36
Level
Early reflections
Large
60 dB
Time
REV. TIME REV. TIME
Reverberations
EFCT TRIM (Effect Trim)
Performs fine adjustment of the level of all the effect sounds.
Control Range:
–3 dB to 3 dB
DELAY
Adjusts the delay between the direct sounds (at the main left,
center and main right channels) and the effect sounds (at the front
effect and rear effect channels). The larger the value, the later the
effect sounds are generated.
Control Range:
15 – 30 milliseconds
60 dB
Time