Transform Audio with PixelWave: Real-Time Browser VisualizerTransform Audio with PixelWave: Real-Time Browser Visualizer
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PixelWave is a browser-based audio visualizer that turns any MP3 or WAV into real-time pixel animations. It includes 4 visualization modes, 4 color themes, a curated tape library, and a beat-sync game where the audio waveform becomes playable terrain. Built with vanilla HTML/CSS/JS and the Web Audio API. No server, no uploads — everything runs locally in the browser.
How I Used Stitch
I brought my concept into Stitch using "Start from existing design." Stitch streamed the generation of all screens directly to the canvas as separate editable frames. I used in-place AI edits to refine screens where the canvas reset mid-generation. Those screens defined the visual direction and component structure of the full build, deployed to Netlify.
The "Start from existing design" feature was the most useful part — importing my HTML file and getting 5 separate editable frames immediately saved a lot of time.
The main friction I encountered was with undo/redo: when I tried to undo a change on one frame, it reverted all frames back to an earlier state, not just the specific edit. This made iterating carefully on individual screens less predictable.
Overall Stitch significantly sped up going from concept to structured screens. Live Demo https://pixelwave-demo.netlify.app/
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Rishi's avatar
The beat sync game idea is pretty creative. Not many entries are exploring audio as the core experience. Also agree on the undo issue, ran into a few similar moments while iterating.
Here's what I built for the challenge: https://on.contra.com/pnfJBQ

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Denis's avatar
Whoa, didn’t see this coming and now I can’t look away.
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