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Chapter 3 - Overview
52 Q20 Reference Manual
Input High Frequency Roll Off
This is a lowpass filter that can be set between 200Hz and 20kHz, and attenuates
all frequencies above this value by 6dB per octave.
Predelay
All the reverb effects also have pre-delay parameters. Predelay slightly delays
the reverb itself up to 250 ms, so that the dry signal more easily stands out from the
reverb. A bit of predelay can make certain instruments (such as snare drums) sound
bigger.
Predelay Mix
This allows you to balance the amount of predelay to direct signal as a percentage
of each. This gives you the ability to hear a bit of the reverb before the loudest
part of the reverb (the predelayed reverb) sounds, and makes for a bigger, smoother
sounding reverb.
Reflection Level and Spread
This is only used with the more complex reverb algorithms, such as Room 2, Hall 2,
Plate 2, Chamber 2 and Large Plate. Level controls the amplitude of the early
reflections. Spread controls the reflectionÕs density, or how close they are together.
Reverberation Swirl
This adds a type of stereo chorus-like the effect to the output of the reverb. Only
used in Room 2, Hall 2 and Large Plate, this parameter is most useful for smoothing
the decay of the reverb when set at a low value. When set to a high value, it
creates a more dramatic detuning effect.
Reverberation Attack
Only used in Plate 2 and Chamber 2, this controls the amount of extra signal added
to the beginning of the reverbÕs effect, which in turn controls the intensity of the
reverbÕs attack.