Christoph Bielen Uniretro

Christoph Bielen has released Uniretro, a freeware virtual analog synth made with SynthMaker.

Uniretro’s innovative sequencing and retrigger capabilities make it suitable for trance sounds.


  • 3 x Multi-mode oscillators with PM and FM capabilities
  • 2 x User Envelopes
  • 2 x LFO
  • 1 x Multimode filter
  • Pitch, Trigger, Hold and Modulation sequencers
  • Distortion, Decimator, Chorus and Delay effects
  • 50 Presets
  • Up to 4 Voices

Uniretro can be downloaded directly from SynthMaker.