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GFM Koch

Synth by Auburn Sounds

Free Product

Pitched percussive synth

GFM Koch is a synthesizer able to generate the punchiest percussive notes, by construction.

Thanks to the purity of its integration, its sound is especially crystalline from the lowest to the highest frequencies. Thus it is suitable for sub-bass stabs, percussive basses, emulating electric pianos and tonal percussions.

To compliment this raw sound, a sub-oscillator and voice-wise distortion is provided. This distortion is devoid of aliasing, again by construction.


  • Koch usually generates a lot of low frequency energy. Better use your preferred high-pass filter behind.
  • Not too fond of Koch note envelope? Use a compressor behind Koch to tame the dynamics.

System Requirements

  • VST 2.4 and Audio Unit plug-in for Windows and Mac

Check out Auburn Sounds' Graillon HERE