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ACCESS VIRUS OS4
171
Delay/Reverb
the amount of pre-delay has a 
decisive impact on our perception 
of the size of a room.
When you set a high pre-delay 
value - say some hundred millisec-
onds - you’re actually creating an 
“unnaturally” large room. The 
room simulation will sound 
washed out or much like a diffuse 
echo. Pre-delay has a formative 
effect on room simulation, particu-
larly since - like with the pure 
DELAY algorithms - you can use it 
to match the reverb effect to the 
rhythmic context. And like the 
DELAY parameters, pre-delay is 
infinitely variable, it is suitable for 
generating feedback, and it can be 
synced up to the global clock gen-
erator.
REVERB PREDELAY controls the 
absolute pre-delay time in millisec-
onds (ms). The peak value depends 
on the room size (REVERB TYPE, see 
above) that you have selected 
because the room simulation and 
pre-delay share the same memory. 
Pre-delay time is infinitely variable. 
Changing the delay time bends the 
pitch of the reverb signal. REVERB 
PREDELAY will not appear in the 
display when the pre-delay 
amount is determined via REVERB 
CLOCK (see below).
01111111111111111112
 1 REVERB
 PreDelay  500.0≤
61111111111111111154
REVERB CLOCK
When you set it to OFF, the abso-
lute predelay time is determined in 
milliseconds. If you select a note 
value, then the predelay time is set 
to the value of this note. The abso-
lute length of this note value 
depends on the value entered to 
CLOCK TEMPO in the global clock 
generator (refer to this section). In 
this case, the absolute predelay 
time in milliseconds is ignored. 
01111111111111111112
 1 REVERB
 Clock       Off≤
61111111111111111154