4MER 4-Oscillator Waveshaping Polysynth For Reason

Ochen K introduced 4MER, a a four-oscillator, eight-operator, waveshaping polysynth Rack Extension for Propellerhead Reason.

Here’s what they have to say about it:

4MER’s sound engine starts with four independent oscillators. Each oscillator begins as one of 25 single-cycle waveforms. Then, using eight waveshaping operators, those waveforms can be mangled, warped, shifted, saturated, bit crushed, phased, and more. Each oscillator can be independently routed through 4MER’s five 16-stage envelopes, two multi-mode filters, and unison effect. Then use the on-board reverb, delay, and tone stack to mold the sound.

Want something a little less static? Use 4MER’s 10-channel modulation matrix to hook up 4MER’s four LFOs, five envelopes, and a host of other modulation sources to modulate nearly every single parameter in 4MER

Need more modulation sources and routings? 4MER has six generic CV in connections, as well as 30 more dedicated CV in connections.

Here’s the official video intro:


  • Pulse Width
  • Spread
  • Harmonics
  • Warp
  • Sync
  • Saturation
  • Bit Crush
  • Phase

Filter Modes:

  • LP 6 (Low Pass with 6db falloff)
  • LP 12 (Low Pass with 12db falloff)
  • LP 24 (Low Pass with 24db falloff)
  • HP 12 (High Pass with 12db falloff)
  • HP 24 (High Pass 24db falloff)
  • Band Pass
  • Notch (or Band Reject)

On Board Effects:

  • Unison
  • Reverb
  • Digital Delay
  • Four-Point Tone Stack

Audio Demos:

4MER is available now for US $39 in the Propellerhead Shop.

2 thoughts on “4MER 4-Oscillator Waveshaping Polysynth For Reason

  1. While the 20+ minute video shows off its’ technicality. I am still disappointed in not hearing the raw sound of it.

    The linked demos (songs?/ with beats) do not provide a clear example (to me) of how this Rack Extension actually sounds.

    Wonder if they will make a 4MER for Live.

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