modular systems » Eurorack modules » VCAs » linear & exponential

Two identical VCAs whose characteristic can be selected between linear or exponential each, ie. they can process as well audio as CV signals. The VCAs don't have attenuators at the signal inputs but they can handle also very loud signals of 16Vpp amplitude (-8V to +8V) without distorting.

With the Model 110 Quad Gate, musicians can add the distinctive sounding, nonlinear VCAs of the Buchla 100 series to their Eurorack synthesizers. The circuits are controlled via potentiometers and CV inputs. The VCAs’ response characteristic is exponential in the first third of their control range. In the second third, the response characteristic changes to linear and finally to logarithmic behavior. Additionally, some saturation is applied at the upper edge of the control range. The Model 110 Quad Gate does not feature vactrols. Thanks to its ultrafast response time, the module is a great partner for creating percussive sounds. Furthermore, the Model 110 is able to perform amplitude modulation at audio rates.

The Hex Mix VCA is an amplifier / mixer module featuring six channels. Each signal path comes equipped with an input, a level potentiometer, a CV connector and an output. Additionally, there is a potentiometer for crossfading between logarithmic, linear and exponential response curve per channel. In use, the Hex Mix VCA shines with clean, uncolored sound. Thanks to its editable response curves, the module is very flexible.

Excellent sound for little money – Liivatera's Dual VCA comes equipped with two voltage controllable amplifiers. The circuits can work in a linear or an exponential mode of operation. Normalizations allow users to employ the module as a panner or mixer. In terms of sound, the Dual VCA shines with crystal clear, voluminous results. Besides audio material, the amplifiers are also suitable for processing control voltages.

The Quad VCA is composed of four analog amplifiers. Their response is continuously adjustable from linear to exponential characteristic. Potentiometers allow the user to adjust levels manually. For modulations, there is a CV input plus attenuator per channel. Boost switches can increase the output level by approximately +6 dB. Thanks to normalizations, it is possible to influence several channels with just one incoming control voltage. Signals can be summed, meaning the module is also useable as an excellently equipped, superbly sounding mixer.

General knowledge: you can never have enough VCAs, be it for voltage controlled regulation of audio signal levels or the modualtion intensigy of a CV signal. The Veils module has not less than four VCAs aboard which offer a mix function and for each channel individual control of the characteristic, from linear to exponential.

Vintage Edition with a black faceplate and custom knobs.

Two identical VCAs whose characteristic can be selected between linear or exponential each, ie. they can process as well audio as CV signals. The VCAs don't have attenuators at the signal inputs but they can handle also very loud signals of 16Vpp amplitude (-8V to +8V) without distorting.

AMPLITUDE is an analog, discrete transistor VCA with a wide range of saturation and distortion. Capable of emulating the warmth and fatness of vintage synthesizers, this behavour can be even pushed to the extreme. The VCA's characteristic can be blended from linear to exponential, even dynamically with a CV!

This envelope generator can be used in a number of ways: as classic gate-triggered ADSR or as a self-containting, looping AD/ADR envelope with one-shot possibilities. Besides this a VCA is integrated, which is normalized to the enveliope or can be used autonomously.

Small, high-quality one-channel VCA that is built around a THATcorp 2180 VCA chip.

High-quality dual VCA module from Vermona, versatile due normalizations, a summing output as well as inividually switchable amplification ratios and response curves. Use it as two VCAs, voltage controlled mixer, as stereo VCA or as an overdrive.

The digital VCA by WMD contains two independent analog VCAs under digital control. The biggest benefit ist that the zero crossing of the audio signal is being analyzed what will prevent annoing clicks when using extremely fast percussive envelopes for modulation.

Intellijel uVCA II is a narrow and useful module from the cooperation of Intellijel and David G. Nixon. This module is a dual VCA suitable for controlling levels of audio signals and control voltages.

This very practical module has been designed with the goal to give you a versatile dual VCA with a lot of possibilities. Besides the use as a two individual VCAs with switchable characteristics the module features mix outputs, a number of useful combinations of both VCAs like crossfade, panner etc. Besides this you´ll find useful normalizations and a saturation stage.

VCA module with exponential and linear control inputs. This way it can be controlled by any type of control voltages and it is suitable to control both audio signals and CVs.