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Iris is an art project & visualization system written in Odin & Raylib, which runs on desktop systems that support openGL, including Raspberry Pi.

It contains...

• an audio engine which performs basic audio analysis (RMS, centroid, FFT)
• scenes which are passed the audio features for visualizing
• shaders n stuff
• keyboard-centric control
• (hopefully) decent performance for low-powered systems (RPi)
• (planned) automatic scene switching

Scenes are inspired by artefacts from Greek mythology.

Food of the gods.

Cursed jewellery.

Blades of sound.

Under construction ⚠️

Iris has a layer-based key mapping system for ready-to-hand & expressive keyboard control.

There are 4 key map layers. In each layer, the alphanumeric keys are used as primary keys for certain actions.

Activated by holding the Ctrl+Alt modifier

• Toggle FPS: /
• Toggle cursor visibility: c
• Quit: q

Primarily for switching between scenes.

Permanent latch: [Alt/Option]+Enter or [Alt/Option]+Tab
Temporary latch: Alt/Option

• [a-z] keys switch scenes (currently only a handful do something)
• [1-9, 0]for setting the audio input level (1 is min, 0 is max, i.e. number-row-as-a-slider)

For toggling effects.

Permanent latch: Shift+Enter or Shift+Tab
Temporary latch: Shift

Actions:

• Toggle pixelate: p
• Toggle warp: w
• ...more coming
• Clear all: backspace

Under construction ⚠️

For controlling individual scene parameters.

Permanent latch: Ctrl+Enter or Ctrl+Tab
Temporary latch: Ctrl

Under construction ⚠️

Iris can be extended with the addition of scenes: simple structs which provide a draw procedure. Scene draw procedures are passed the scene's current state, a set of params (which includes audio features) and a texture to draw to. Scenes are initialised in init_scenes in scene.odin.

scene_utils.odin contains utilities for visualization: a stateless LFO including smoothed random, interpolators, polar/cartesian convertors & colour utilities.

• One Fantastic Bind (music video) - hops & Icebeing (2025)

• Coding Challenge 183: Paper Marbling Algorithm - Daniel Shiffman / The Coding Train
• greekmythology.org
• ICEBEING
• Don’t Forget the Laptop: Using Native Input Capabilities for Expressive Musical Control - Rebecca Fiebrink, Ge Wang, Perry R. Cook
• Hydra video synth - Olivia Jack
• EYESY™️ - Critter & Guitari
• Atmospheric Plugin Design (ADC 2024) - Syl Morrison

N.B. Iris is in its very early stages and will remain unstable/experimental for some time. I'm not actively seeking contributions but will happily answer any questions about the project.