Sinevibes Intros ‘Barber-Pole’ Style Flanger Effect For OS X, Eternal

Sinevibes has introduced Eternal, a ‘barber-pole’ flanger effect for Mac OS X.

Unlike traditional flangers, which have their tone repeatedly go up and down, Eternal is a flanger that goes upwards or downwards in a seemingly endless fashion.

To accomplish this effect, Eternal uses an array of three stereo flangers and six calibrated low-frequency oscillators. Since these oscillators have a ‘through-zero’ design, it allows Eternal to seamlessly go from downwards to upwards motion and back.


  • Three stereo flangers with negative or positive feedback.
  • Six through-zero oscillators for creating endless upwards or downwards “barber-pole” motion.
  • Stereo modulation phase shift for variable stereo field widening.
  • Color-coded controls with lightly animated transitions.
  • Fully hardware-accelerated rendering with support for Retina screen resolution.
  • Works with any application that supports Audio Unit effect plugins.
  • Supports OS X 10.6 or later running on 32 or 64 bit Intel Macs.

Pricing And Availability

Eternal is available now for US $29. A demo version is also available.

6 thoughts on “Sinevibes Intros ‘Barber-Pole’ Style Flanger Effect For OS X, Eternal

  1. “Through-zero”—amusing…since it probably can’t access the future, they must have moved “zero”. But I think they mean that the delay to move “zero” is taken into account in the latency compensation. Seems hardly worth mentioning these days, but that’s marketing I suppose.

    1. It’s not through-zero flanging but a through-zero oscillator used for modulation. It can run with “negative frequency” meaning that the phase runs backwards. What it gives is seamless adjustment from negative frequency, through zero, to positive frequency – or vice versa. E.g. you can go from upwards ramp to DC to downwards ramp with one control.

  2. But wheres the barber pole part?
    You can here wobble going back and forth but that’s the opposite of barber pole that is suppose to be endlessly rising or falling…

    1. It’s easy to tell cycles apart when they’re very fast… but at any speed modulation is mathematically either upwards ramp or downwards ramp, not up and down, and this effect is showing its “seemingly endless” nature at slower speeds, -0,2..+0,2 Hz.

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