Freeware Virtual Putney Synthesizer

Putney Virtual Synthesizer

Ninecows has released The Putney v2.0 (.zip download link), a freeware architectural replica (SynthEdit) of the EMS Putney. The plug-in runs as a VST effect, not a VST instrument.


As the original it is constructed of basic modules connected in a matrix, letting you route sources and control voltages to different destinations. Many module based synths can do that, but the Putney has one remarkable difference: There is no clear distinction between audio and control voltages as sources. For instance; you can let the output of one audio oscillator control the frequency of another, or use the noise generator to control the filters cut-off frequency.

Even though the synth (just as the original) is monophonic, the flexible routing system will let you create a huge variety of different sounds and effects.


  • Oscilators – Osc 1: Triangle and Sinus shaped wave, Osc 2 & Osc 3: Triangle and Square shaped wave (Osc 3 operates in an approximately 20 times lower frequency range, useful for LFO).
  • Noise generator – produces white noise, which is passed through a filter letting you change the colour of the noise with the colour knob.
  • Filter/Oscillator – signals assigned to the Filter column of the matrix will be summed and send to the filter.
  • Envelope generator – Attack, On, Decay and Off.
  • Trapezoid – control voltage produced by the envelope generator is duplicated and send to the trapezoid module where it can be modified further by adjusting its level or adding/subtracting a DC voltage.
  • Effects – Ring modulator, Reverberation (spring reverb), Delay.
  • Output channels – VU meters and tuner which enables you to tune the oscillators to the standard 440 Hz tuning.
  • The Matrix – Route sources and desitination (also inverting signals).

The Virtual Putney looks nothing at all like a real Putney. If you’ve got one, let me know if it sounds at all like a Putney!

via Rekkerd

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