Audio Damage Aeverb - Manual

Æverb Digital Reverb
ADM05
Control voltages present at the
jacks are added to the values set
with the knobs.
The useful range of voltage for the
CV jacks is ±5V.
The audio input signal goes in
here. The hardware will be
happiest if the signal level is
within ±7V.
The processed signal comes out here. It may
or may not bear much resemblance to the
input signal.
Assembled in USA from US and foreign components.
Revision 1.0
©2014 Audio Damage, Inc.
www.audiodamage.com
Knobs Control-Voltage Jacks
Audio Input Jack Audio Output Jack
Audio Damage Æverb is a digital reverb running a feedback
delay network algorithm (commonly called “FDN”). The
algorithm consists of eight short delays running through
eight low-pass filters, with the feedback paths summed in
to a single source that provides both the output
to the mix and the input to the delays themselves. This
type of reverb algorithm is generally considered
“vintage” sounding, and is useful in electronic music for
its thick, non-realistic behavior.
DECAY controls the overall gain of the
feedback loop of the delay network. More
gain results in longer decay times.
DAMP controls the corner frequency of the
filters on the individual delays, and works in
an inverse manner to a normal filter frequen-
cy control. At full anti-clockwise, the sound is
very dull, while at full clockwise, it is bright.
Note that we have allowed a full-on value,
even though this will result in a fairly noisy
signal due to the nature of FDN reverbs. (All
the noise in the single path gets amplified
and repeated ad nauseum.) The “sweet
spot” is at about 3 o’clock, resulting in a
signal that is bright but not too noisy.
The MIX knob controls, as the name implies,
the relative levels of the wet and dry signal.
At full anti-clockwise, the output is 100% dry,
and at full clockwise, it is 100% reverb.
Positive voltages at the DECAY jack
increase the decay time. Negative
voltages decrease it.
Positive voltages at the DAMPjack
decrease the damping and brighten
the reverb, while negative voltages
increase the damping and make the
reverb duller.
Positive voltages at the MIXjack
increase the reverb-to-dry signal
ratio, while negative voltages
decrease that ratio.
This reverb is not intended to be a studio-quality all-around
hall simulation; rather, it is a fun and musical addition to an
electronic musician’s toolset, with an eye to creating the
dense reverbs commonly used on Warp Records releases in
the mid 90s. (The name is a clue.)
The reverb algorithm doesn’t respond well to a driven
input; if you find the reverb to sound too distorted for your
liking, try attenuating the input signal a bit. Lower inputs
produce cleaner results.