ALESIS QS8.1 - Manual (Page 105)

Part 6: Editing Effects
QS7.1/QS8.1 Reference Manual 99
Room. The Room reverb type simulates not only rooms of different sizes, but rooms
with different surface materials. A room with soft surfaces such as carpet will produce
a reverberant sound with much less high end (treble) than a room with hard surfaces.
This reverb type can easily simulate both examples and many, many more.
Hall. Much larger than a room, Halls are characterized by their high ceilings,
irregular shapes, and generally uniform density of reflections.
Large. Much larger than a hall, this reverb type emulates the large ambient spaces
found in amphitheaters, gymnasiums, etc.
Gate. 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 TIME
Range of Settings: 0 to 299ms Pages 6 & 7
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 page 6 to adjust the Pre-Delay
Time in 10ms intervals, and/or use page 7 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.
PRE-DELAY MIX
Range of Settings: IN<99DEL to IN99>DEL Page 8
This parameter allows you to control the balance between the Pre-Delayed signal of
the Reverb and the straight Reverb itself. It gives you the ability to hear a bit of the
Reverb before the loudest part of the Reverb (the Pre-Delayed Reverb) sounds, which
makes for bigger and smoother sounding Reverb settings. When this is set to <99 you
get the Reverb signal with no Pre-Delay, while a setting of <0> gives an even mix and
a setting of 99> gives you pure Pre-Delayed reverb.
INPUT FILTER
Range of Settings: 00 to 99 Page 9
This parameter adjusts the frequency of the low-pass filter which affects the audio
before it reaches the Reverb input. Lower values remove high frequencies from the
input signal, which is what to do if you want to make the Reverb effect less bright.