Instruo Troika

Triple analogue VCO with crossfaded waveforms, hard sync, linear FM and PWM

32 HP Eurorack module

Troika is a 32HP triple analogue VCO from Instruō. Each of the three oscillators has its own coarse and fine tuning, 1V/Oct input (with a per-oscillator link toggle for summing/normalling pitch CV across voices), linear FM input with attenuator, hard sync input, individual waveform output, and Level knob feeding the internal mixer at Mix Out. Each oscillator additionally has a unique pair of morph-pairs selected by a waveform toggle and crossfader, allowing analogue interpolation between every classic VCO waveform. Oscillator 3 swaps one of its morph pairs for a dedicated PWM pulse mode with CV control.

Features

• Three independent analogue VCOs in a single 32HP module
• 1V/Oct tracking on every voice
• Per-oscillator 1V/Oct Link toggles for normalled multi-voice CV
• Linear FM input with attenuator on every voice
• Hard sync input on every voice
• Unique waveform crossfade pairs per oscillator (analogue interpolation)
• Pulse-width modulation on oscillator 3 (knob + CV)
• Per-voice waveform outputs
• Internal unity-gain mixer with dedicated Level knobs and Mix Out
• Designed and built by Instruō (Glasgow, Scotland)
• Reverse-polarity protected power input
• 27mm depth — case-friendly

Controls & Jacks (37)

• Mix Out
• Oscillator 1 Coarse
• Oscillator 1 Fine
• Oscillator 1 Linear FM Attenuator
• Oscillator 1 Level
• Oscillator 1 1V/Oct
• Oscillator 1 Sync
• Oscillator 1 Linear FM
• Oscillator 1 Out
• Oscillator 1 1V/Oct Link
• Oscillator 2 Coarse
• Oscillator 2 Fine
• Oscillator 2 Linear FM Attenuator
• Oscillator 2 Level
• Oscillator 2 1V/Oct
• Oscillator 2 Sync
• Oscillator 2 Linear FM
• Oscillator 2 Out
• Oscillator 2 1V/Oct Link
• Oscillator 3 Coarse
• Oscillator 3 Fine
• Oscillator 3 Linear FM Attenuator
• Oscillator 3 Level
• Oscillator 3 1V/Oct
• Oscillator 3 Sync
• Oscillator 3 Linear FM
• Oscillator 3 Out
• Oscillator 3 PWM
• Oscillator 3 PWM CV
• Oscillator 1 Sine/Triangle Mix
• Oscillator 1 Saw/Square Mix
• Oscillator 2 Sine/Triangle Mix
• Oscillator 2 Saw/Square Mix
• Oscillator 3 Sine/Triangle Mix
• Oscillator 1 Wave Select
• Oscillator 2 Wave Select
• Oscillator 3 Wave Select

How-To Guides

• Detuned three-oscillator voice
• Two-operator linear FM
• Hard-sync lead
• Pulse-width-modulated bass
• Polyphonic three-voice patch

Explore the interactive Troika panel on BleepDex — tap any control to learn what it does.