Alesis QuadraSynth Plus Reverb (Page 3)

Editing Effects: Chapter 7

QuadraSynth Plus Piano Reference Manual 149

Gated. Gated Reverb is a very popular effect on drums first

found on English records in the early 1980s. This reverb type can

simulate applying a noise gate (a device that automatically

decreases the volume once the signal falls below a certain level)

across the output of the reverb thereby causing the initial attack

of the reverb to sound very big, but the tail of the reverb to be

cut off very quickly. Although this effect is not found in nature,

it works great for modern drums, percussion, and any quickly

repeated, transient source.

Reverse. The Reverse Reverb type is an inverted reverb in which

the volume envelope is reversed. This means that the signal

begins softly but grows louder until it is cut off, rather than loud

to soft as normal.

Pre-Delay is the slight delaying of the Reverb itself so that the

dry signal more easily stands out from the Reverb. A bit of Pre-

Delay can sometimes make certain instruments (such as snare

drums) sound bigger. Use Quad Knob [2] to adjust the Pre-Delay

Time in 10ms intervals, and/or use Quad Knob [3] to adjust the

Pre-Delay Time in 1ms intervals. This Pre-Delay is part of the

Reverb itself; don’t confuse it with the separate Delay modules

available under the Delay function.

Quad Knob [4] 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.

Reverb (Page 3)

This is a low-pass filter which comes before the Reverb input.

Use Quad Knob [1] to adjust the filter frequency. Lower the

Input Filter to remove high frequencies from the input signal

before they go into the Reverb.

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.

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