VOSIS Pro 4+

Life Orange LLC

    • $7.99


VOSIS is a synthesizer combining audification of greyscale pixel data with several image filters. It is a tool for image sonification, visual music composition, and experimental sound design. The audification of pixel luminance values creates shape-timbre relationships. Pixel scan rate is controlled in terms of note interval, octave, and scale to give varying pitch between image regions. The ADSR envelope allows one to play images as a non-linear sequence of pitches with varying wavetable/timbre.

VOSIS Pro adds several features to VOSIS useful for sound designers and musicians: Save and load custom presets, connect a MIDI keyboard and play regions with keys, map any control and region positions to MIDI CC, unlimited recording and screen mirroring with no watermark, downsampling/blur/sharpen, and tremolo filters, subdivide large regions into step sequence mode, load video files (iPad and Desktop versions only).

Visit vosis.app for sound example, demo videos, and user guide!

What’s New

Version 2.1.2

Improved sound engine:
- Raw duration scanning (matches sound of original VOSIS 1.0 2014-2021)
- New Granular engine for region Durations - cleaner, artifact-free time-stretched sounds
- Improved Limiter and fixed possible distortion issues when recording with polyphony or gain over 0dB

Note Stealing added for MIDI and Touch regions.

Fixed frame rate issues when switching between cameras.

Ratings and Reviews

Erwin Dink ,

crashy crasherson

This is a 5 star app even though it crashes to the point of being almost unusable. The vision and interface are brilliant. The sounds are awesome. But I haven’t been able to save anything more than a few very short, very simple videos.

I open a video, add 5 scan areas, and then BAM, it quits. Sometimes I don’t even make it to 5 areas. Sometimes the visuals freeze and it becomes unresponsive to touch even though it continues playing the sounds.

Stick with the free version. I had less problems using it. Which is a shame, because the Pro version is a expensive.

At first I thought it was crashing or freezing because my battery was low. But it continued to be a problem with a full charge. Then I tried closing all my apps, and restarting my ipad, but still haven’t gotten the Pro version to last more than 20-30 seconds. I can do 5 or 10 second video recordings with 2-3 scan areas but that’s about it so far. I’m on a pro ipad 12.9 inch 512GB.

Gonna keep trying, though, because the aesthetic fits a project I have in mind…

petemuzak ,

Great app but doesn’t work in AUM or Cubasis

I had this app for years and rediscovered it while purging my iPad of apps I don’t use. I am now in love this app and have many ideas for it but it doesn’t work in the background in AUM or Cubasis nor does it recognize midi inputs in AUM or Cubasis. The webite doesn’t have enough support data. If this app was able to temp sync to both of these apps it would be amazing.

As a stand-alone app it would be nice if you have an option to save audio only. Also play/stop video controls. Using the speed slider is not always usable. Also the ability to not loop the video would also be good. Playing a video in reverse could also be an interesting feature.

Hope the developer sees this and responds.

App Privacy

The developer, Life Orange LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

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

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