User Manual

FRONT PANEL 
Controls 
[1] CV Attenuator - Controls the amount
of CV modulation sent to control a
channel’s level. Because the CV
inputs cascade, if there is no CV input
on a channel, but a preceding channel
has a CV input, this knob will bring up
that previous channel’s CV signal.
[2] CV LED - Each of the four channels
has a red/green LED whose intensity
shows the post-attenuator level of the
incoming CV signal. It lights green for
positive voltages and red for negative.
[3] Linear / Exponential Response -
This attenuator controls the response
of the channel’s VCA to the LEVEL
knob and CV input. When fully
counterclockwise the response of the
channel’s VCA is exponential. When
turned fully clockwise the response is
linear. In-between settings provide a
variable response between the two
extremes.
[4] BOOST - When this switch is set to
the left position (disabled) the maximum linear gain of the channel’s VCA when the LEVEL knob
is fully clockwise or +5 V is applied to the CV input is approximately unity (1:1). When set to the
right position (enabled) the signal is boosted by around +6 dB (2:1).
[5] LEVEL 1 - Sets the base level, or bias, of the channel’s VCA. When fully clockwise this
approximately equivalent to applying a +5 V voltage at the CV input. In the fully linear response
this results in unity (1:1) gain. The knob level is summed with the channel’s CV input.
[6] LEVEL 2 - Sets the base level of channel 2.
[7] LEVEL 3 - Sets the base level of channel 3.
[8] LEVEL 4 - Sets the base level of channel 4.
Quad VCA Manual 6