Mackie DL1608 Reference Guide V1.2
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Reverb Sliders
The following is a list of sliders available for each selected reverb. Slide left to decrease the reverb time
and slide right to increase the reverb time.
Pre Delay (All)
When listening to a live performance, direct sounds are reached first, followed by reverberation
caused by room reflections. The pre delay is the amount of time between when the direct sounds
arrive and when the reflections arrive. The range is 0 ms to 300 ms.
The speed of sound is approximately 340 meters per second (1100 feet per second). This means that
in one millisecond, it travels 0.34 meters (110 feet). As a rough idea, think of 1 ms as the time it takes
for sound to travel one foot.
Damping (All)
Damping increases or decreases the decay time of the higher frequencies relative to the overall
decay time. That is, the amount of sound reflections that make up the reverb. Lower values sound
“thinner,” while higher values give a smoother-sounding decay. The range is 500 Hz to 20 kHz.
Decay (All)
This represents the decay time of the reverb. The range will vary depending on the reverb chosen.
Rolloff (All except Gated Reverb)
This provides a 24 dB/octave low-pass filter at the output of the reverb. This allows the level of the
audio range to be rolled off above the frequency set by this slider. The range is 500 Hz to 20 kHz.
Release (Gated Reverb)
Release is the amount of time it takes for attenuation to happen. The range is 50 ms to 3000 ms.
Parameter
Low Value
High Value
Default
Pre Delay
0 ms
300 ms
0 ms
Damping
500 Hz
20 kHz
20 kHz
Decay
0.1 s – 4.0 s
1.3 s – 10.0 s
2.00 s
Rolloff
500 Hz
20 kHz
20 kHz
Release
50 ms
3000 ms
250 ms
Delay Type
Delay allows adjustment of the effect delay. The Master Fader app comes with five delays to chose from:
mono, tape echo, stereo, ping-pong and multi-tap. A button displaying the current delay type may be
tapped to reveal the other delay types. Tap the delay you would like for the selected channel.
Delay Type
Description
Examples
Mono
The mono delay provides an echo effect with a mono delay line. Mono delay is great for added
depth and space. Pink Floyd
guitarist David Gilmour is one
of the kings of delay.
Tape Echo
Tape Echo provides a single, relatively rapid delay of the original
signal, with the added warmth that vintage tape-based echo
units provided.
Often used on vocals for a
1950’s-era feel, or on guitars
for a surf-type tone.
Stereo
The stereo delay is a stereo version of the mono delay, with a left
and right input and a left and right output. Each side (left and
right) has its own set of controls).
A guitarist with dual outputs
(or A/B switcher) can create
interesting stereo delays,
setting each amp’s delay times
independent of the other one.
Ping-Pong
The ping pong delay works the same as the stereo delay,
with the exception that the feedback is routed to the opposite
channel, producing a bouncing sound as the delayed signal
bounces from left to right.
Similar to the stereo delay
example, but instead of each
delay being set independently
of the other, this creates a
steady ping-pong delay with
varying speed.
Multi-Tap
This allows you to create two delays with different lengths.
With added feedback, you can
create very interesting effects
on a guitar solo.
