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Algorithmic Sequence Piano with Sonic Controls

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By curran on VizHub

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Algorithmic Sequence Piano with Sonic Controls

0 stars0Public
CCurran Kelleher
Last edited Nov 10, 2026
Created on Nov 10, 2026
Forked from Piano App

An interactive virtual piano with white and black keys generates musical tones through the Web Audio API, allowing play via mouse, touch, or keyboard. The instrument displays a realistic 3D design using CSS gradients and shadows, with visual feedback through CSS transitions on key presses. A built-in demo melody button triggers a pre-programmed scale. The implementation dynamically creates piano keys through DOM manipulation and uses Web Audio API for audio synthesis with gain control, demonstrating front-end techniques for responsive instrument interfaces.

Sonic Aura Sequencer

An algorithmic step sequencer that generates evolving musical patterns and lets you sculpt the overall "sonic aura" with a live control panel.

How to Use

  1. Press Play — the sequencer runs a 16-step loop.
  2. Click cells in the grid to toggle notes by hand, or press Generate to re-roll an algorithmic pattern based on the current density.
  3. Use the Aura Controls sliders to shape the sound in real time:
    • Tempo — playback speed (also retunes the delay time)
    • Density — probability weighting used by the generator
    • Filter Cutoff — low-pass filter brightness
    • Attack / Release — envelope shape of each note
    • Delay Mix / Feedback — echo "aura" depth
    • Detune Spread — oscillator detune for width/warmth
  4. Checkboxes change the character:
    • Sine / Triangle / Saw — oscillator waveforms (multi-selectable)
    • Drone Pedal — a low root note every two bars
    • Arpeggio — staggers simultaneous notes into a rippling arpeggio
    • Minor / Major scale — tonal mood
    • Aura Glow — pulsing visual bloom synced to playback
    • Swirl FX — the aura ring orbits with the playhead
    • Chords — adds soft thirds and fifths under low notes

References

MIT Licensed