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VIRUS CLASSIC MANUAL 123
The Effects Menu
REVERB PREDELAY
This parameter controls the pre-delay time of the given room simulation.
In a real room, sound travels quite a distance and is reflected at least once before it reaches your
ear. This means that a certain amount of time elapses before you hear the earliest reflections of the
room signal. The bigger the room, the longer it takes for the reflected signal to reach your ear. This
effect is emulated in a room simulation be means of a parameter called pre-delay. Irrespective of the
values set for the other REVERB parameters, 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 milliseconds - 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, particularly 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 generator.
REVERB PREDELAY controls the absolute pre-delay time in milliseconds (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).
REVERB CLOCK
When you set it to OFF, the absolute 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 absolute 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.
REVERB FEEDBACK
Available exclusively for the Rev+Feedb1 and Rev+Feedb2 algorithms, this parameter controls the
amount of pre-delay feedback. Here the room signal is repeated at intervals that are determined by
the pre-delay time. Note that the signal level fades gradually. REVERB COLOR also has an influence
on feedback. The intensity of the filtering effect generated by the low-pass or high-pass filter
increases with every repetition. Feedback is subtle when the decay time of the room (REVERB
DECAY TIME) is long. The effect will become more prominent when you set a short decay time and
a long pre-delay time.