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Manufacturer Description:

a-101-2 is a vactrol based combination of low pass filter (lp) and vca
and was inspired by the buchla module 292. the term "low pass gate" was
created by don buchla and stands for a module that can be switched
between low pass and vca. the control (manually and via external cv) is
responsible for frequency in the low pass mode and for loudness in the
vca mode. additionally a combined mode lp+vca is available. in this mode
the sound becomes more dull as the loudness decreases.

in contrast to the buchla design the a-101-2 offers attenuators for both
cv and audio input, a manual resonance control and two gate inputs to
control the function of the module in addition to the manual toggle
switch.

in principle the a-101-2 is a 12 db low pass filter that can be switched
to vca or a combination of low pass and vca. the controlling elements
for frequency (lp mode) resp. amplitude (vca mode) are so-called
vactrols. vactrols are known for their smooth sound behaviour.

the frequency (in the lp mode) resp. the amplitude (in the vca mode) is
controlled manually (f/a) and by the 2 control inputs cv1 (without
attenuator) and cv2 (with attenuator).

the audio input is equipped with an attenuator to enable distortion too
(above ~ position 5 distortion is obtained with standard a-100 audio
levels, e.g. vco).

the resonance function "colors" to the sound and is adjustable all the
way up to self-oscillation. resonance and consequently self-oscillation
may vary with the filter frequency because of vactrol tolerances. due to
the circuit the resonance has a little bit an influence on the audio
level (increasing resonance = increasing audio level). to obtain the
original buchla sound the resonance control simply has to be set fully
counterclockwise.

the function of the module is controlled by a manual switch. the left
and right positions of the switch correspond to lp resp. vca mode. in
the middle position one obtains the combination of low pass and vca. in
this position it is also possible to control the function of the module
by the two gate inputs g1 and g2. the table printed at the front panel
shows the connection between the gate levels (l = low, h = high) and the
module function.

due to technical reasons the vactrol modules are not available with blue leds.

this module has a maximum current draw of 20ma. it requires 8 te/hp worth of space to fit in a eurorack frame.

ConditionBrand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.Learn more
Brand
Model
  • A-101-2 LPG Vactrol Low Pass Gate
Categories
Made In
  • Germany
Synth Module Function
  • VCA
  • Filter
  • Low Pass Gate
Horizontal Pitch
  • 8HP
Modular Synth Format
  • Eurorack

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NOISEBUG

Pomona, CA, United States
Sales:12,117
Joined Reverb:2016

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