Korg Prologue, Minilogue XD & NTS-1 Just Got Infinitely Flangier

Sinevibes has introduced Eternal, a barber-pole flanger effect, for Korg Multi-Engine synths, including Prologue, Minilogue XD & NTS-1 .

Unlike a traditional flanger which has its tone repeatedly go up and down, a barber-pole flanger goes upwards or downwards endlessly. To do this, Eternal uses a low-frequency oscillator with six output signals which modulate and crossfade three flangers, so that the effect can endlessly rise or fall.

The LFO’s also have a “through-zero phase” design, so Eternal can go from downwards to upwards motion and back completely seamlessly.


  • Studio-grade DSP algorithms, calibrated specifically for KORG’s hardware platform.
  • Individually chosen mapping for every parameter, providing a very natural feel.
  • Built-in lag filters for noise-free, ultra-smooth parameter adjustment.
  • Optimized for maximum performance and stability on each individual device type.


  • KORG prologue
  • KORG minilogue xd
  • KORG Nu:Tekt NTS-1

Here’s an example of Eternal being used on the NTS-1 to process guitar:

Pricing and Availability

Eternal is available now for $19.


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