DOEPFER A-107 Manual - Page 11
Browse online or download pdf Manual for Water Filtration Systems DOEPFER A-107. DOEPFER A-107 18 pages. System a - 100, multitype morphing filter
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5. Filter Unit Controls
! Audio In
•
Level Control
The socket is the audio input of the filter were the
audio signal has to be fed in. The attenuator controls
the input level of the signal to be filtered. If the filter's
output signal is distorted, turn this control down, unless
the distortion is wanted as a special effect. Distortion
appears approx. above middle position of the control
(~5) for normal A-100 signals (e.g. VCO A-110).
" Frequency
This group of controls serves to define the filter fre-
quency. It contains a manual frequency control and
two frequency CV inputs (one with attenuator, one
without attenuator).
The filter frequency is manually adjusted with the
manual frequency control. To modulate the cut-off
frequency by an external voltage (e.g. from a LFO or
ADSR) the control voltage has to be patched into one
of the two frequency control inputs. One input is
equipped with an attenuator to control the frequency
modulation amount of the corresponding input.
System A - 100
The effect of filter frequency depends upon the filter
type that is selected with the programming unit. In
case of a lowpass or high pass it is the cut-off fre-
quency, for a bandpass or notch it is the middle
frequency. More details can be found in the manuals of
other A-100 filters (e.g. A-121, A-123, A-124, A-108,
A-105/122).
§ Resonance
This group of controls serves to define the filter reso-
nance/emphasis. It contains a manual resonance
control and two resonance CV inputs (one with at-
tenuator, one without attenuator).
The filter resonance is manually adjusted with the
manual resonance control. To modulate the resonance
by an external voltage the control voltage has to be
patched into one of the two resonance control in-
puts. One input is equipped with an attenuator to
control the resonance modulation amount of the corre-
sponding input.
According to the selected filter type the resonance
effect emphasizes the frequencies around the cut-off
frequency (lowpass, highpass) or alters the bandwidth
(bandpass, notch). For the new filters without names
Multitype Morphing Filter
A-107
11