⚛️ MolecularSynth

An interactive web-based synthesizer that translates the structural and quantum properties of chemical molecules into sound and musical patterns.

The Experiment

MolecularSynth is an experiment in data sonification, exploring the question: “How we would sonify a molecule structure?”

It transforms abstract chemical data—from 2D structure and molecular weight to quantum mechanical properties like HOMO-LUMO energy gaps—into an interactive auditory and visual experience. The goal is to provide a novel, intuitive way to perceive the characteristics of different molecules through sound, and use it for creative expression.

Methods & Technology

The application employs a parameter-mapping strategy to sonify chemical data using standard web technologies.

Sonification Method

Atom Sonification: Each type of atom (C, N, O, H) is mapped to a unique sonic profile, including a base frequency, waveform (sine, sawtooth, etc.), and filter settings, giving each element a distinct timbre.
Structural Sequencing: In playback mode, the application sequences through the atoms in the molecule, creating rhythmic and melodic patterns based on the structure.
Interactive Modes: Different modes reinterpret the molecular data for creative effect:
- Structural: Emphasizes the unique sound of each element.
- Melodic: Maps atoms to notes within musical scales.
- Electronic: Links sound characteristics to properties like electronegativity.
- Soundscape: Creates an ambient drone based on the molecule’s overall properties.

Technology Stack

Audio Engine: The Web Audio API is used for all real-time sound synthesis, including oscillators, gain nodes, filters, and spatial panning.
Visualization: Molecules are rendered as SVG elements, dynamically generated and animated using JavaScript and CSS Custom Properties.
Interface: The entire experience is built with vanilla HTML5, CSS3, and JavaScript (ES6), with no external frameworks.

Features

Interactive 2D visualization of a library of common molecules (Caffeine, Aspirin, etc.).
Multiple sonification modes for different auditory perspectives.
Detailed sound design controls for timbre, harmonics, spatial width, and more.
Transport controls (Play, Stop, Loop) and a real-time audio visualizer.