grain discharge

Grain Discharge is a granular effect where grains are driven by a fluid simulation instead of a static trigger model.

Incoming audio excites the simulation, cavitation events appear, and those events spawn grains from a rolling history of the source signal. Because the simulation is the event driver, it shapes timing, impact, movement, and the overall character of the grain cloud. That means the same loop does not repeat in exactly the same micro-pattern every pass. It stays connected to the source, but it does not behave in a rigid way.

I made it by reusing the fluid simulation from Cavitation Fractures, but for something much more musical. The point was not to make another standard granular effect with fixed timing and a more interesting interface. The point was to let the simulation actually matter.

It can go in a few different directions depending on how it is set:

• reactive rhythmic sprays from drums and percussion loops.
• smeared cloud-like atmospheres from sustained synth or guitar input.
• reverb-adjacent texture layers with more motion and edge.
• creative transitions where the instability still feels musical.

The main controls are built around steering the behaviour rather than just setting grain size and hoping for the best:

• Burst and Density shape how active and crowded the cloud gets.
• Friction changes how the movement drags and settles.
• Speed slows the simulation down or lets it run more freely.
• Size, Fade In, and Linger shape how the particles and grains evolve.
• the pitch-family controls add harmonic colour and movement inside the cloud.

A big part of the concept is that the visuals and the sound are tied to the same thing. The animated field is not there just to look busy. It reflects the same simulation that is driving the grain behaviour.

There are no hidden panels or secondary pages. Everything important is in front of you.

Highlights:

• cavitation-driven grain spawning.
• grains triggered from recent input history instead of fixed static timing.
• behaviour-shaped granular response with movement and personality.
• useful for both rhythmic grain sprays and smeared cloud textures.
• visual behaviour tied to the same engine that drives the sound.

Good fit for:

• acoustic sounds.
• sustained synth and guitar material.
• texture layers and transitions.
• producers who want granular movement without rigid repetition.

Videos.

Full walkthrough:
{See video at top of page}

Sound demo and patch ideas:
https://www.youtube.com/watch?v=OkqZOa7cqdI