Yamaha DSP-A2070 Operation Manual page 47

REV. DELAY (Reverberation Delay)
This parameter sets 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 will begin. A later
reverberation sound makes you feel like the space of the acoustic
environment has become larger.
Control Range:
100 – 170 milliseconds
Level
Direct sound
Reverberations
REV.DELAY
REV.TIME
60 dB
Time
REV. LEVEL (Reverberation Level)
This parameter adjusts the volume of the reverberation sound.
The larger the value, the stronger the reverberation becomes.
Control Range:
1 – 100%
Level
Direct sound
REV. LEVEL
Time
45