Doepfer A-99 Handleiding
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doepfer System A - 100 Spring Reverb A-199
1
1. Introduction
Module A-199 is a spring reverb module that simula-
tes the reverb effect by means of 3 spiral springs. 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 avai-
lable. The feedback loop can lead even via external
modules like VCA, VCF, phaser, frequency shifter, vo-
coder, distortion/waveshaper, ring modulator and
others.
Another feature is the Emphasis control. This enables
the adjustment of the accentuation of middle frequen-
cies (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 ef-
fects can be generated with the A-199.
Level
Level
Emphasis
ext.
Feedb.
In
A-199
SPRV
Mix
Reverb
Out
Mix
Out
Feedback
Pay attention to the power supply recommendation at
the end of this manual (page 6) if you are about to
plan an A-100 system that includes an A-199.
A-199 Spring Reverb System A - 100 doepfer
2
2. Overview Controls:
1 Level : Attenuator for the the audio
input signal at input !
2 Feedback : Manual feedback control, resp.
attenuator for external feedback
signal at socket "
3 Emphasis : Control for accentuation of
middle frequencies ~ 2kHz
4 Mix : Control for setting the relation
between original and reverb si-
gnal at mix output $
In- / Outputs:
! Audio In : Audio input
" ext. Feedback In : Input for external feedback
§ Reverb Out : Audio output pure reverb signal
$ Mix Out : Mix output containing both
original and reverb signal
(relation is adjusted with control
4)
A-199
SPRV
Audio
In Level
Feedback
Emphasis
Mix
➀
➁
➂
➃
0
10
0
10
0
10
0
10
Spring Reverb
ext. Feedb.
In
Reverb
Out
Mix
Out
doepfer System A - 100 Spring Reverb A-199
3
3. Controls
1 Level
Attenuator 1 controls the level of the input signal fed
into socket !.
2 Feedback
Knob 2 controls the share of the reverb signal that
is fed back to the input. Feedback can be adjusted as
far as self-oscillation (as for some filter modules of
A-100, e.g. A-120/121/122/123). The self-oscillation
behaviour depends upon the properties of the spring-
system.
H If external feedback is used this control acts as
an attenuator for the external feedback signal. In
this case the reverb output § is passed through
one or more A-100 modules and then fed back
to socket " (refer to chapter 5: user examples).
3 Emphasis
This control enables the adjustment of the accentua-
tion of middle frequencies (around ~ 2kHz, see fig.
1). This gives more “pressure” or “presence” to the
reverb effect.
Fig. 1: Effect of emphasis function
4 Mix
This control adjusts the relation between original
and reverb signal appearing at output $.
300 Hz 1.0 k Hz 10 kHz
Pay attention to the notes concerning the posi-
tion and assembly of the reverb system at the
end of this manual.
To minimize hum noise we recommend the
usage of the special A-100 power supply with
ring core transformer (A-100PSU2) instead of
the standard power supply.
Product specificaties
| Merk: | Doepfer |
| Categorie: | Niet gecategoriseerd |
| Model: | A-99 |
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