TubeOhm – Phoenix/Shruthi (CD4069 VCF) – FULL DIY KIT

£160.00 (Excl. VAT)

MIDI controlled monophonic synthesizer with WASP style CD4069 Filter

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SKU: Kit_Tubeohm_Shruthi_Wasp-VCF Categories: , , , , , Brand:


The Phoenix / Shruthi CD 4069 is a midi controlled monophonic synthesizer, with a CD 4069 filter similar to the EDP WASP synth from 1978.

The synth voice features 2 versatile digital oscillators, a sub osc and a multimode WASP style filter with distortion. There are a plethora of modulation possibilities using the 2 LFOs, 2 ADSRs and 4 CV ins, all of which can be assigned using the extensive modulation matrix.

The kit comes with an easy-to-assemble acrylic case, with protective glass for the LCD screen.


  • 2 digital oscillators
  • 1 sub oscillator
  • 2 LFOs
  • 2 ADSR generators
  • Step sequencer and Arpeggiator
  • CD 4069 Filter – Lowpass and Bandpass, with distortion modes.
  • audio input / output


  • Midi in / out
  • 12-fold internal modulation matrix
  • 4 assignable external CV inputs (0-10 Volt, overvoltage and reverse polarity protected)

The complete CD 4069 KIT includes:

  • the motherboard/PCB: all electronic and mechanical parts, a pre-programmed Atmega , an EE-Prom with 128 sounds, LCD, ICs, Resistors, capacitors, screws and spacers for the case
  • the filterboard/PCB : all electronic parts
  • the case with switch, rubber feet

Does not include power supply Phoenix needs a power supply 9V 600 mA , 5,5-2,1 centre positive

Motherboard build docs:

– Motherboard build manual

– Schematics

– PCB files (CC-BY-SA) Mutable Instruments /Firmware (zip)

Filter board build docs:

– DIY-MANUAL-CD4069-filter-english

– Schematics

Additional information

Weight 0.492 kg

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