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Instruo Tòna - Analogue Voltage Controlled Oscilator


Product Description

Tòna is a single voice, all analogue voltage controlled oscillator.

It generates all classic waveforms simultaneously and, in addition, sports a built in wavefolder as its 5th output. The wavefolder is derived from classic west coast ‘timbre’ circuits and opens up a world of rich harmonics and complex spectra, adding a touch of west coast flavour to any subtractive synth voice.

Individual outputs for square, sawtooth, triangle and sine waves, plus the additional wavefolder output.


The wavefolder uses the Tòna’s sine wave, and folds its peaks back and forth several times in order to create complex harmonic overtone patterns.

Controllable via a smooth action 30mm fader, the wavefolder control gives high precision control when sweeping through a wide spectrum of overtones. The fold amount can also be directly controlled with CV, scalable with an inbuilt attenuator.


The Tòna can be frequency modulated at a dedicated linear FM input with its own built in attenuator.

Rising edge pulses will reset the sawtooth core’s waveform cycle allowing for hard sync to a primary oscillator signal.


With a negative DC offset at the 1V/octave or linear FM input, the frequency range can be descended into LFO territories while retaining stability over all output waveforms.



+12V: 60mA

–12V: 60mA

Depth: 27mm

  • Sawtooth core analogue oscillator
  • 1V/octave, Coarse and Fine pitch controls
  • Oscillator hard sync
  • Linear FM with attenuator
  • Individual outputs for Sine, Triangle, Sawtooth and Square waveforms
  • CV controllable ‘timbre’ wave folder with dedicated output

Product Videos

Instruo - Tona (Saw-Core Analogue VCO with Linear FM & Wavefolder) 15:13

This is Tona from Instruo. It's a 12HP saw core analogue VCO with the usual square, saw/ramp, triangle and sine wave outputs but there's also an on board wave folder that takes the sine and uses a slider to create the fold level as well as a CV input and attenuator to modulate the folding. There's also a sync and linear FM input. It tracks well, sounds great, and works great with the Ts-L as a complimentary pair of oscillators. Subscribe for more DivKid videos: Be awesome! Support me on Patreon -

  • Instruo - Tona...
    This is Tona from Instruo. It's a 12HP saw core analogue VCO w...

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