Module A-199 is a spring
Reverb
module. The
Reverb
effect is electronically simulated by means of 3 spiral springs. Spring
Reverb
systems have a very characteristic sound that is based on the (insufficient) mechanical properties of the springs like signal delays, audio resonances, limited frequency range, acoustic
Feedback
behaviour, sensitivity to mechanical shocks and others.
The 3-spring system used in the A-199 ensures a "dense"
Reverb
because of the different properties of the three springs.
The A-199 implies some special features that are not self-evident for spring
Reverb
units:
The
Reverb
signal can be fed
Back
to the input using the
Feedback
control. Even self-oscillation of the springs similiar to the self-oscillation of filters is available. The
Feedback
loop can lead even via external modules like VCA, VCF,
Phaser
, frequency shifter, vocoder, distortion/waveshaper, ring modulator and others. In this case the
Reverb
output of the A-199 is connected to the input of the external module(s) and the output of the external module(s) is fed
Back
to the Ext.Feedback In socket of the A-199. This socket contains a switch that interrupts the internal
Feedback
loop as soon as a plug is inserted.
Another feature is the Emphasis control. This enables the adjustment of the accentuation of middle frequencies (around ~ 2kHz).
With the Mix control the relation between original and
Reverb
signal appearing at the mix output is adjusted.
Using all these features very extreme and unusual effects can be generated with the A-199.
Inputs: Audio In, ext.
Feedback
In (switched socket)
Outputs:
Reverb
Out (pure
Reverb
signal), Mix Out
Controls: Level (input level),
Feedback
, Emphasis, Mix