MODULE 2010 - QUAD VOLTAGE CONTROLLED AMPLIFIER

The 2010 Quad VCA module is an array of four independent linear two quadrant multipliers. It is particularly useful for spatial modulation and voltage controlled mixing. Each of the four identical VCA sections can function totally independently. The gain at zero control voltage for each VCA is determined by the associated initial gain control. Setting the control left of center always results in zero gain, but as the control is rotated further counterclockwise, more control voltage is required before the VCA begins to pass any signal. The effective control polarity may be selected by a switch for each VCA. In the + position, the gain is increased for positive control voltages, in the - position it is decreased. Hence a single control voltage applied to two control inputs can turn one channel on and the other off. This is most useful in mixing and panning operations. The lag control introduces a finite attack and decay into the control path. This is useful when digital signals are used on the control inputs, as it eliminates the pops resulting from sharp attacks. The lag time is variable from a few microseconds to approximately 0.1 second.
As a convenience for voltage controlled mixing, the sum of the four VCA outputs is available. Note that this output is inverting.
Each signal input is internally pre-patched to the input above it, so that to use a single signal source for all four VCA’s it need only be patched to the top input. If two inputs were required, each to a pair of VCA’s, one would patch to the first and third inputs. This of course aids in voltage controlled panning operations. The control inputs are similarly prepatched for voltage controlled mixing.

Panel size : 3 Width Units

Power Requirements : ±15 V @ 30 mA typical

Price : 390€