A single-file HTML "sound lab" that generates tones with the Web Audio API and shows live visuals to explain why some intervals feel smooth and others feel spicy.

Includes:

• Waveform (time domain)
• Spectrum (frequency domain)
• Ratio geometry (Lissajous symmetry from musical intervals)
• Music-reactive cymatics-style plasma disc (resonance "mode snapping")
• A clearer "sacred geometry" view (clean symmetric curves that react to audio)

1. Save the project as index.html (single file).
2. Open it in a modern browser (Chrome / Edge / Firefox / Safari).
3. Click Play (browsers require a user gesture to start audio).

No build step. No dependencies.

• Play / Stop: start/stop the synth
• Copy link: copies a shareable URL that includes your current settings in the hash
• Surprise: randomizes settings

• Base frequency (Hz)
• Wave type (sine / triangle / sawtooth / square)
• Harmonics (brightness)
• Attack / Release (envelope)
• Interval or chord
• Second tone mix (how loud the interval/chord is vs the root)
• Detune: Off / Tiny / Medium
• Live mini view mode:
  • Ideal
  • Live (osc pair)
  • Live (texture)
  • Live (cymatics)

• Visuals: waveform + spectrum + ratio geometry
• Music-Reactive Cymatics: plasma membrane resonance disc (audio-driven)
• Reactive Sacred Geometry: clearer, line-based symmetry view (audio-driven)

Smooth:

• Octave (2:1)
• Fifth (3:2)
• Fourth (4:3)

Spicy:

• Minor 2nd (16:15)
• Tritone-ish (45:32)

Tip:

• Use Live (osc pair) + Detune: Tiny to see phase drift / beating and how symmetry "smears".

The app stores settings in the URL hash so links reproduce the same UI state.

Common keys:

• f base frequency
• w wave type
• h harmonics
• a attack
• r release
• i interval ratio or CHORD:*
• m mix
• d detune level
• lm live mini view mode

Use Copy link to generate a share URL.

• If visuals look blank: click Play first (audio unlock).
• If Copy link doesn’t work: some browsers require HTTPS or clipboard permission.
• Performance: cymatics views cap render rate (~30fps) and adapt internal resolution to stay smooth.

MIT (give credit where it is due).