JAX Unisonic (Audio Unit‪)‬ 4+

Multi Pitch Shifter, Unison FX

Jens Guell

    • 4.3 • 8 Ratings
    • $19.99



The 8X Unison Effect and multi pitch shifter with individual voice control and tempo delays.

JAX Unisonic is a special Audio Unit, able to produce up to 8 additional voices from any audio input (also polyphonic audio) by multiplying and shifting it in pitch and other parameters. Audio Units require a host application for operation.

The concept of JAX Unisonic is loosely derived from ‘Unison’ which was adopted from the ancient analog synthesizer world, where manufacturers and sound designers intended to fatten the sound by multiplying and stacking available voices together. Also digital synthesizers did adopt this technique to fatten sound sources.
Due to the instability of analog oscillators and components and some wilful detuning, an interesting sonic effect is achieved, giving the produced tones significantly more presence and life. Unison voices are still excessively used in modern music styles today. (In classical music compositions ‘unisono’ basically means a performance, where multiple instruments or voices play the same parts in an ensemble fashion.)


Now JAX Unisonic can simulate this sonic effect with any audio source by incorporating a bank of independent time domain pitch shifters, that are optimized to detune and spread artificially multiplied voices in panorama. It can be understood as a kind of super chorus generator or an ensemble like effect with variable, realtime controlled intensity and pitch relation. But it is clearly something more.

With JAX Unisonic you can create up to 8 additional voices, that will be passed thru a chain of pitching and positioning, creating massively fattened sounds with any kind of voice input. Additionally you may transpose each voice individually per semitone to max. +/- 1 octave, something that cannot be achieved with usual choruses, unison or ensemble effects and moves the results slightly in the direction of the category “harmonizer” effects. Although the harmonic results can be programmed (automated) freely and are not auto generated in any way, as on some available other harmonizers.

The used pitch shifters in our JAX Unisonic are NOT based on the phase vocoder paradigm (FFT) and do not introduce the static latencies, which are unavoidable by the latter. A time domain pitch shifter in contradiction, uses very small delay buffers, where the latency is dynamically adjusted (dependent on the used pitch shifting amount) and much smaller and nearly latency-free. Such pitch shifters are better situated for live usage therefore. Although, such pitch shifters sound slightly more raw and tend to produce disharmonic overtones with more extreme values.


JAX Unisonic may be used as a massive unison effect generator or more decently for creating various, more subtile effects for improving sonic qualities of parts in a composition. For instance controlled voice detuning, manual pitch correction, doubling of vocals or solo instruments or just to give some boring voices more interest and static sound some special movement. It is even usable with drums, adding subtile or even massive new frequency components.

What’s New

Version 1.8

User Request Update V. 1.8
Many thanks to Paul Levis, actively supporting us with the bug report!

- There was a nasty logical coding error, which prevented JAX Unisonic to behave correctly, that is fixed now.
The parameter state was wrongly reset while operation with certain actions. Rendering down or freezing resulted in dry sound.

- The sample rate was changed to 48000 Hz by default now. Because all latest Apples devices are fixed to this system sample rate.

Ratings and Reviews

4.3 out of 5
8 Ratings

8 Ratings

Tenente ,

A go-to FX for sound creators

When a track/stem needs something but I don’t know what it needs, I turn to this (among others) to find how much more mileage I can get out of a sound. It usually proves to be quite a bit more.
Why? 8 lines each w/ it’s own pan/delay/pitch/gain control.
You select which/how many lines to activate and adjust as needed.
This can function as a solid, creative utility for mixing in addition to serving as a creative sound design tool.

polarpaul ,

Great thickener and stereo voice tool

The app is a great tool to have for shaping and leveraging your audio material. Lots of possibilities for designing new sounds from your current ones.

Industrialminded ,

Very unimpressed

Crashes a lot when I host it in ape matrix. Interface is absurdly tiny and fiddly to use unless you are zoomed way in on a certain portion of the plugin. Edit:Apparently they are also emotionally unstable. I was generous w the two stars.

Developer Response ,

Yes. We know.
All of our Audio Units are actually crap and useless.

And we are dumb and talent-less ppl, who better should have learned something other than attempting to design and create professional (or even very basic) audio stuff. 

Possibly such as 'cleaning the streets'. 
Please send us a pistol, and we'll using that to end all that awful disaster.

PS: The interface can be freely zoomed. And if your host crashes, there may be the possibility that the host is doing something wrong. We advice you to enable automated crash reports on your devices to actually being able to identify these issues.

App Privacy

The developer, Jens Guell, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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