# JAX Unisonic (Audio Unit) — Multi Pitch Shifter, Unison FX > Audio Unit for multi-pitch shifting and unison effects on any audio input. (iPhone/iPad app by Jens Guell.) - Source: https://appshunter.io/ios/app/jax-unisonic-audio-unit/id1492522141 (this page in markdown: same URL + `.md`) - Developer: [Jens Guell](https://appshunter.io/developer/1195004865) - Category: Music, Productivity - Price: $9.99 (on sale, was $24.99) - Rating: 4.30/5 from 8 App Store ratings · 7 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 40 MB - Languages: American English - Released: 2019-12-23 - Data updated: 2026-08-26 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/jax-unisonic-audio-unit/id1492522141/reviews.md ## What is JAX Unisonic (Audio Unit)? 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.) Technical 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. Usage 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. ## Key features - Generates up to 8 additional voices - Multiplies and shifts audio input pitch - Simulates analog synthesizer unison effects - Individual voice transposition (+/- 1 octave) - Time domain pitch shifting (low latency) - Panorama spread for voices ## Recent user reviews (7 of 7) All indexed reviews: https://appshunter.io/ios/app/jax-unisonic-audio-unit/id1492522141/reviews.md ### 2/5 — great plugin but crackles in zenbeats *2022-11-07* crackles in zenbeats ### 5/5 — A go-to FX for sound creators *2021-02-01* 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. ### 4/5 — Sehr nützliche App! *2020-04-23* Macht, was sie soll, 100% korrekt kommt sie mir noch nicht vor? ### 3/5 — It could be me... *2020-02-03* But I have tried this in various instances and have repeatedly failed in achieving anything I like. In theory this sounds amazing but have yet to practically use it although user error may be part of it. Will update once I achieve that eureka moment. If ever. ### 2/5 — Very unimpressed *2020-01-23* 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. ### 5/5 — Great thickener and stereo voice tool *2020-01-05* 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. ### 5/5 — Astral toad *2020-01-04* Great app. Great developer. Have them all and use them constantly. ## Frequently asked questions about JAX Unisonic (Audio Unit) ### What is JAX Unisonic? JAX Unisonic is an Audio Unit that creates up to 8 additional voices from any audio input by multiplying and shifting them in pitch and panorama. It's designed to fatten sounds and add presence, inspired by analog synthesizer techniques. ### How does JAX Unisonic differ from a chorus effect? While it can function as a super chorus generator, JAX Unisonic offers more control. It allows individual transposition of each voice by semitone up to +/- 1 octave, moving it closer to harmonizer capabilities. ### What is the latency of JAX Unisonic? JAX Unisonic uses time domain pitch shifters, which have dynamically adjusted, much smaller latencies compared to phase vocoder-based effects. This makes it better suited for live usage with nearly latency-free operation. ### Can JAX Unisonic be used with polyphonic audio? Yes, JAX Unisonic is capable of producing additional voices from polyphonic audio inputs, allowing for complex sound manipulation on multi-note sources. ### What devices support JAX Unisonic? JAX Unisonic is supported on iPhone, iPad, and iPod. It requires a host application to function as an Audio Unit. ### What is the price of JAX Unisonic? JAX Unisonic is available for a one-time purchase of $14.99. ### How often is JAX Unisonic updated? The latest version, 1.9, was released on March 3, 2024. Updates are provided by developer Jens Guell to maintain and improve the application. ### Does JAX Unisonic have ads? No, JAX Unisonic does not contain advertisements. It is a paid application with no in-app purchases or ads. ## Version history (last 5 releases) ### 1.9 — 2024-03-03 The product (AudioUnit AUv3) was updated for support of latest Apple technologies and frameworks (architecture: arm64). Minimal iOS target is still 12.0. It also should work on the Vision Pro (compatibility mode). ### 1.8 — 2020-01-16 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. ### 1.7 — 2020-01-14 Maintenance Update 1.7 (specific host problems, again) - The inbuilt MIDI Control of JAX Unisonic is now optional, an additional AU parameter and a control was added to the user interface. Background: JAX Unisonic is basically an *audio effect unit*. (We implemented direct MIDI control merely for more comfort when automating parameters.) However, some host applications do implement MIDI control to audio effect plugins in a very questionable way. The MIDI stream to insert audio effects, (which are audio effects, not MIDI effects!) should be *optionally* routed by host applications. Otherwise these audio effects most likely will not work as expected, if inserted into MIDI instrument tracks for instance (which expect MIDI only). The MIDI enabled effect audio units do not know anything about of where they are inserted. So this is a potentially undefined behavior, if inserted into MIDI instrument tracks and the host then  just forwards these MIDI messages for the instruments wrongly to the connected effects. We therefore added the option to suspend our direct MIDI control to prevent these hosts  forwarding WRONG MIDI data uncontrolled to the chained insert effects. So MIDI control is now switched off by default. If JAX Unisonic is inserted (as an audio effect) into an instrument track, for instance,  the MIDI tor the instruments should NOT be forwarded (passed thru) to the effect(s), as this results in a senseless and questionable, uncontrolled MIDI routing then and (out of) control this way... The MIDI data on such connections are thought for the instruments, but surely not for the chained insert effects! For doing that right, hosts must provide independent MIDI control channels for MIDI enabled audio effects,  as some hosts already implement correctly! Please note, that you now may ignore any direct MIDI capabilities of JAX Unisonic completely, by only using parameter automation. Some hosts will let you assign MIDI controllers to AU parameters and let you do all automation this way. We will, b.t.w continue teaching host developers for doing it right this way. ^^ ### 1.6 — 2020-01-10 Maintenance Update 1.6 - There was a problem when rendering offline with specific hosts, reported by users, that has been fixed now. Background: (Many host developers continuously try to teach audio unit developers. Now we want to teach these host developers. ^^) It is highly problematic, if hosts do a separate process for 'freezing' and exporting audio with (new instances of) audio units invoked. Some hosts even do allow to select completely different global parameters (sample rates and block sizes) for such actions. This is conceptually a bad idea, as this may lead to different rendering results and is also highly problematic for the invoked audio units, because there may be static resources and dependencies between multiple running instances and other stuff happening at runtime. A host should actually do the down rendering of the audio stream exactly the same way as it does the realtime rendering to prevent theses potentially problems. If resampling and/or format conversion are required, this should be done afterwards by the host. Only this way consistent results can be expected by the users. 'What you hear is what you get' is a logical paradigm here. If it works realtime, it should work with freezing and exporting and : exactly the same way and result. ### 1.5 — 2020-01-01 This is the recompiled version 1.3. (now 1.4., ... 1.5.) The initially released version 1.3. was carefully tested on all our development devices and available emulators without any problem. After app store validation processing this release was no longer functional without any hint to a traceable problem. The App Store does not provide any possibility to fix apps with just a new build number.  We get errors with the Xcode archiver trying that. So we provided new builds now (with new version numbers)  and temporarily took out the obviously 'damaged' version from the distribution.  The version notes for the latest release (1.3.) apply to this version. We are sorry about all this trouble. There is another update coming soon, adding new features. ## More apps by Jens Guell - [GM MIDI Player](https://appshunter.io/ios/app/gm-midi-player/id1445780869) - [MIDI SWEET : Clock Sync (AU)](https://appshunter.io/ios/app/midi-sweet-clock-sync-au/id1454284852) - [JAF Model One](https://appshunter.io/ios/app/jaf-model-one/id1472652593) - [JAF Collection](https://appshunter.io/ios/app/jaf-collection/id1472896422) - [JAX Stereo Tool (AU)](https://appshunter.io/ios/app/jax-stereo-tool-au/id1473390302) - [JAX !Make Louder (Audio Unit)](https://appshunter.io/ios/app/jax-make-louder-audio-unit/id1474614677) All apps by Jens Guell: https://appshunter.io/developer/1195004865 ## Related topics [harmonizer audio effect](https://appshunter.io/ios/topics/harmonizer-audio-effect) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*