This free edition of the JAX Convolutor uses over 120 included IR Files for reverberation. All functionality is enabled (except loading own files). The upcoming JAX Convolutor PRO will allow to import / load unlimited individual IR files.

Please understand that convolution uses conceptionally much CPU and requires larger rendering buffers to perform successfully. JAX Convolutors are consequently stereo processing convolutors, that are optimized for usage with very large IR files. This allows them to be used as mastering reverbs.

Convolution effects are well known and commonly used in music production since many years.

Convolution is a highly complex signal processing approach, that needs some certain computation power. The recorded impulse response of a real world environment is used to render a reverberation effect onto any audio material, so that it sounds like the source was played in that original room or location. Some further adjustments and manipulations can be applied to refine these results in realtime.

IR files are mostly files recorded with special equipment, but basically are just usual audio files (srereo) with a reverberated sound of an ultra short impulse. It is even possible to capture synthetic reverbs and other effects with this technique, for instance from famous ancient vintage equipment, as rare plate and spring reverbs. If other kind of files are used, some wired special effects can be achieved thru convolution or just some kind of creative audio garbage. But also rhythmic effects are possible when the correct IR sizes are used (correctly adopted to the current tempo of the composition).

A comprehensive manual is shipped with the app.

What’s New

Version 1.95

Maintenance update version 1.95

This version of the free JAX Convolutor PE was synchronized with the current release of the JAX Convolutor PRO.

Ratings and Reviews

4.9 out of 5
12 Ratings

12 Ratings

AudioFanX ,

True Stereo Convolution

After further testing of other AU convolution reverbs using sources with a wide source imaging, I am revising my review and upgrading this reverb to five stars.

This reverb seems to be the only AU convolution app that does real stereo to stereo processing. As a result, it needs more CPU than the other convolution AU plugins. Those plugins process the left input only through the left IR channel and right channel through the right. While that can sound nice in many circumstances, it will sound very wrong if the source has some sounds that are panned strongly. Let’s say you have an instrument hard panned left. It’s reverberation should not be only be heard from the left speaker. With the two other AUs, I tested, a hard-panned source only reverberated on the side it was panned to. This saves a lot of CPU but messes with the imaging and is very unnatural.

Convolutor, on the other hand, processes both left and right inputs in full stereo. So, it needs to do more processing. In situations where your source has wide panning, you will notice a much better result.

As a result of the processing, you may need to increase your buffer sizes to get playback without crackling, but that is a reasonable price when you need the more detailed imaging.

It would be worthwhile for this plugin to have a switches to do “half-stereo” or “mono-to-stereo” for those cases where you are okay with compromising the imaging in exchange for less cpu use.


Way to go 👍

Sounds fab so far thx for throwing a bone with this one for the issue with your other exciting new app.

anickt ,

Sounds Great

Like all of this devs apps.


Jens Guell
144.8 MB

Requires iOS 12.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


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