Free Mac Audio Filter Plugin – Prosoniq NorthPole

Prosoniq has released NorthPole – a free effects plug in for AudioUnit compatible applications on the Macintosh.

It adds a fully programmable virtual analog synthesizer filter with resonance, envelope follower and an integrated post-filter digital delay to your audio production environment.

This product at a glimpse:

  • Platforms: MacOS X
  • Formats: AudioUnit Latest version: 1.0.1
  • Free

You can send any of your audio tracks through this ‘virtual analog’ effects device to either create spezial effects or to simulate the behaviour of an analog 4-pole synthesizer filter.

New in 1.01:

Clicking on the “Dly Time” text area directly above the delay time slider will set the delay time to the click interval. This is a handy way to adjust the tempo of the delay without figuring out the millisecond value


  • 24dB/Octave (4 pole)
  • variable Cutoff + Resonance
  • Lowpass/Bandpass switchable
  • Envelope Follower with adjustable sensitivity
  • Envelope attack/release times
  • Adjustable analog distortion
  • Adjustable digital delay after filter with time, mix and feedback

Minimum system requirements:

MacOS X 10.4.11 or newer. AU compatible host software. Tested with:

  • Apple Logic 8.02
  • MotU Digital Performer 6.02
  • Ableton Live 7.07
  • RogueAmoeba AudioHijack Pro 2.9.0
  • Apple AU Lab 2.0.1
  • TwistedWave 1.0.0
  • Apple GarageBand 4.1.2

One thought on “Free Mac Audio Filter Plugin – Prosoniq NorthPole

  1. I wonder if this is the mac version of Prosoniq’s North Pole for PC VST that was released years ago as freeware (and apparently discontinued).

    I’ve used that plugin for a long time (on PC) simply because the filter has a wonderful analog character and fits in a mix very nicely.

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