TAKAAB 2VCA v2 Dual Voltage Controlled Amplifier/Attenuator

TAKAAB 2VCA v2 Dual Voltage Controlled Amplifier/Attenuator
A dual linear voltage controlled amplifier/attenuator now in 2HP, based on the
LM31700 chip.

Our re-vamped dual linear VCA. Version 2 is similar to version 1 with some
improvements in quality and response and has also been fit into 2HP. The unit
is pre-offset to be normally closed, a positive voltage applied to the CV input
will amplify any AC or DC signal present at the input, with +5V giving unity
gain. It will accept voltages of up to 10V amplifying the signal up to 200%.

Also new to version 2 are the inverted CV inputs. These invert any CV and sum
it with the non-inverted CV input. For example inputting a positive voltage at
CV INV will have no effect on the VCA if it is currently closed but if there is
a voltage at the CV input acting to amplify the signal, then a positive voltage
at CV INV can be thought of as a secondary subtracting or ducking control.

Furthermore a jumper on the board allows you to set ‘auto-offset’ to the CV
INV control (a single jumper affects both gates). When the unit is set up like
this, inserting a jack into CV INV (even with no signal) automatically applies
a +5V offset to the VCA, opening it up at unity gain. Any voltage at CV or CV
INV will now amplify or duck the signal from this unity gain position. This is
useful for ducking a signal that already has dynamics e.g from a synth voice or
the wet output from a reverb/delay unit.

Facebook Page: https://www.facebook.com/siammodular
Website:
https://www.siammodular.com/takaab-2vca-v2-dual-voltage-controlled-amplifierattenuator