Alesis QS7.1, QS8.1 PRE-DELAY Time, Pre-Delay Mix, Input Filter, Range of Settings 0 to 299ms

Part 6: Editing Effects

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.

QS7.1/QS8.1 Reference Manual 99