Eternal barber-pole flanger

AAX/AU/VST3 for Mac + Windows

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Eternal is a barber-pole flanger effect plugin. Unlike a traditional flanger which has its tone repeatedly go up and down, a barber-pole flanger goes upwards or downwards in a seemingly endless fashion. To accomplish this unique effect, Eternal employs a thoroughly calibrated low-frequency oscillator with six output signals which modulate and crossfade three flangers – and they do this in a very special way. Since these oscillators have a “through-zero phase” design, Eternal can go from downwards to upwards motion and back completely seamlessly. With two distinct timbres available thanks to positive or negative feedback, this plugin produces a wide variety of delicious spectrum sweeps – plus unusual chorus, pitch shift, and stereo widening effects.



  • Triple-layer flanger engine with positive or negative feedback
  • Multi-output, through-zero modulation generator with variable stereo phase offset
  • Low-cut filter to ensure stable operation even at the most extreme settings
  • Lag filters on all continuous parameters for smooth, click-free adjustment
  • Supports mono › mono, mono › stereo, and stereo › stereo channel configurations


  • Color-coded graphic elements
  • Consistent name, mapping, value, and unit implemented for all parameters in both graphic user interface and host control/automation
  • Built-in preset management functions
  • Supports window size scaling up to 200%


  • 64-bit Mac computer with Intel or Apple processor, running macOS 10.9 or later, plus a host application with support for AU, AAX, or VST3 plugins
  • 64-bit PC computer with x86 processor, running Windows 8.1 or later, plus a host application with support for AAX or VST3 plugins