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SampleScience’s free Modular Synth VCO instrument

Emulates Doepfer's A-110-1 module

SampleScience Modular Synth VCO Doepfer A-110-1 analogue Eurorack module emulation

SampleScience have announced the release of Modular Synth VCO, a free virtual instrument that they say meticulously recreates the distinctive sound of Doepfer’s A-110-1 VCO module.

Modular Synth VCO models the A-110-1 VCO’s four primary waveforms (sine, square, sawtooth and triangle) and promises to accurately recreate the instabilities in the original module’s analogue circuitry. Despite its simple design, it is said to be well-suited to creating a wide range of sounds, including deep basses, ethereal pads, soft keys sounds and more.

The instrument offers a choice of three voice modes: polyphonic, monophonic and legato, with plenty of shaping control provided by an ASDR amplitude envelope, whilst tonal control and note transition behaviour are taken care of by Preamp and Glide parameters. A Modulation section houses Depth and Rate controls for the built-in LFO, the wave shape and target of which can be assigned from the top of the GUI, and a built-in filter offers a choice of low- or high-pass operation modes.

There are also four onboard effects sections that are each equipped with their own dedicated set of parameters and overall mix controls. A Distortion processor with Drive and Gain controls is followed by a Delay section with adjustable Time and Feed parameters and a Chorus effect kitted out with Freq (frequency) and Depth knobs. Lastly, there is a Reverb section equipped with Size, Damp and Width parameters.


Modular Synth VCO is supported on PCs running Windows 8.1 and higher and Macs running macOS 10.14 and later. VST, VST3 and AU plug-in versions are available, and the instrument requires 149MB of disk space.


Modular Synth VCO is available now and is free to download from the SampleScience website.

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