Alesis QSR 64 manual Pre-Delay Mix 99 to 0 to, Input Filter 00 to, Decay 00 to

Editing Effects: Chapter 7

Pre-Delay Mix (<99 to <0> to 99>) Page 8

This allows you to mix the amount of Pre-Delay into the Reverb signal path. This gives you the ability to hear a bit of the Reverb before the loudest part of the Reverb (the Pre-Delayed Reverb) sounds. This makes for bigger and smoother sounding Reverb settings.

Input Filter (00 to 99) Page 9

This adjusts the frequency of the low-pass filter which comes before the Reverb input. Lower the Input Filter value to remove high frequencies from the input signal before they go into the Reverb.

Decay (00 to 99) Page 10

The Reverb Decay determines how long the Reverb will sound before it dies away. When using the Reverse Reverb type, Reverb Decay controls the Reverse Time.

Low Decay and High Decay (00 to -99) Pages 11 & 12

These two parameters allow the Decay Time to be set separately for both the low and high frequencies of the Reverb. This means that you have control over the tonal shape of the Reverb itself, being able to make the high frequencies die faster if the effect is too bright, and being able to make the lows die faster if the effect is too boomy. This allows you to simulate different surfaces of a room or hall, with softer surfaces absorbing more high frequencies and smaller rooms having faster low frequency decay. If the selected Reverb type is Gate, the Low Decay parameter is unavailable.

Density (00 to 99) Page 13 (Page 12 if Gated or Reverse type)

Density controls how the first reflection of the reverb effect will appear. When set to 0, the first reflection is heard alone without any other reflections. When set to 99, the first reflection appears to “fade-in” and then “fade-out”. This is because a number of reflections will occur just before and just after the first reflection, in addition to the remaining reflections heard after the first reflection; the reverb sounds more “dense”. If the select Reverb type is Large, the Density parameter is unavailable.

Diffusion (00 to 99) Page 14 (Page 13 if Gated or Reverse type)

Diffusion determines the “thickness” of the reverb sound by adding more reflections to the reverb’s decay. With lower diffusion settings, you may be able to actually hear the individual echoes that make up the overall reverb sound. With higher diffusion settings, the echoes increase in number and blend together, washing out the reverb’s decay. Greater diffusion works better with percussive sounds, whereas less amounts of diffusion work well with vocals and other sustained sounds.

DIFFUSION OF 0

L

E

V

E

L

TIME

Fewer reflections

DIFFUSION OF 99

L

E

V

E

L

TIME

More reflections

Note: The illustration above reflects a Density setting of 0.

QSR Reference Manual 24