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Fragment - live additive synthesis with Open Stage Control/OSC & videos

Fragment is an online collaborative additive / spectral and soon granular live-coding web. platform, the spectrum is created by a live GPU script, the generated visual is then converted to audio by an additive process (re-synthesis).

This is a video of an one hour additive synthesis live patches coding session which use some of the new features coming soon in an update, features such as OSC support (Open Stage Control is used in the video to controls partials & some parameters), videos import with loop/playback settings which influences partials and new MIDI key release feature among other things.

The video demonstrate live visuals compositing as well.

Open Stage Control is used to setup partials and control some partials parameter in real-time such as attack and decay etc.


There is a morphing between the two row of partials setup.

The videos used for the visuals (simple compositing) are :

Esocentrica by ASD + Satori : https://www.youtube.com/watch?v=fFs4d7npoyM

Monstra Kosa by Zden Satori and Raiden + Revisq : https://www.youtube.com/watch?v=nqXGjxS0a-8

Solaris rain indoor : https://www.youtube.com/watch?v=EyiunprqMqM

Stalker Monologue : https://www.youtube.com/watch?v=VCmpG0IJfLQ

The Chrome browser was launched with "--disable-gpu-vsync" and FAS was set to 120fps limit.

The source-code of the script which is used to produce all sounds in this video is available here :


Some amount of reverb and a delay effect is added inside Renoise DAW, MIDI sequences are coming from Renoise.

You can try the Fragment synthesizer now at : https://www.fsynth.com

Documentation: https://www.fsynth.com/documentation

Forum : https://quiet.fsynth.com

Renoise : https://www.renoise.com/