IO Instruments Themisto

IO Instruments Themisto; Eurorack module; analog VCO; outputs for sine, tiangle, ramp, sawtooth, square (with adjustable pulsewidth); square-suboscillator with switchable phase inversion; frequency range: 10Hz - 130kHz; switchable LFO mode (0,5Hz - 6kHz); CV inputs for linear and exponential FM, each with attenuators; CV input for pulsewidth-modulation; VCO sync input; buffered Thru-outputs for V/Oct and Sync-Gate; power consumption: 60mA (+12V) / 60mA (-12V); width: 12 HP; depth: 22mm

Further Information

Analog Yes
Digital No
Width 12 TE / HP
variants IO Instruments
7 Customer Ratings
  • 5
  • 4
  • 3
  • 2
  • 1
4.4 /5
  • handling
  • features
  • quality
Unbeatable at the price
Imnothere, 09.10.2020
I couldn't find any other Eurorack VCO in this price range that offered so many features at the price. The obvious competitors are the Doepfer A110-1 and 110-2 but the Themisto wins out with its suboctave output, sine output and linear FM with attenuator.

I don't have proper test equipment, but as far as I can tell the tracking is very good over the audio range and the waveforms look precise - if you're looking for analogue "quirkiness" and "character" then you may have to add your own.

There are two jumpers on the back to enable v/oct and gate from the Eurorack bus.

Cons: The knobs feel a bit wobbly (even alongside low-cost modules from Doepfer and Behringer) and - although the fine tune knob makes it easy to tune accurately - the slightest touch on the coarse-tune knob knocks it off tune (I'm tempted to just remove the knob). That's why it doesn't get a clean 5 stars.

Documentation is minimal - you know how to use a VCO, right?

Being picky, an octave switch would have been a nice addition, and I'd prefer a layout with controls at the top and jacks at the bottom...
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Show variations of this product
IO Instruments Themisto
IO Instruments Themisto

IO Instruments Themisto; Eurorack module; analog VCO; outputs for sine, tiangle, ramp, sawtooth, square (with adjustable pulsewidth); square-suboscillator with switchable phase inversion; frequency...

  • Analog: Yes
  • Width: 12 TE / HP
  • Digital: No
  • variants: IO Instruments
Dreadbox Hysteria
Dreadbox Hysteria

Dreadbox Hysteria; Eurorack module; analog VCO; frequency range from 16Hz to 32,000Hz; quantizer with two modes; Hard Sync input; separate pulse output; blends seamlessly between all waveforms ; CV...

  • Analog: Yes
  • Digital: No
  • Width: 10 TE / HP
  • variants: IO Instruments
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Delivery free of charge expected between Monday, 7.12. and Tuesday, 8.12.

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