Stretch without the chipmunk
Slow a vocal or a loop down to half speed without dropping the pitch — or speed it up without the squeak.
Audio morphing Building
Ψ Lab
Audio Morphing
A real, client-side phase vocoder. Stretch time without changing pitch, freeze a moment into an endless pad, run it backward, or smear it into an ambient cloud — an experiment in reshaping the time of a sound.
- Flagship
- Ψ Morpher
- MVP
- Phase-vocoder island: time-stretch + freeze + reverse + smear, fully client-side.
- Audience
- Producers · Sound designers · Audio developers
- Monetization
- Free experiment — a public sandbox for phase-vocoder audio morphing.
01 Working preview · morpher
Working preview — this lab runs but is still being built out. Expect rough edges.
Ψ Morpher
Drop an audio file, or use the built-in sweep. Stretch time without touching pitch, freeze the current moment into an endless pad, reverse it, or smear it into an ambient cloud — all processed live in an AudioWorklet, in your browser.
A real phase vocoder running in an AudioWorklet. Your audio never leaves the browser.
How this is measured 02 Use cases
Freeze a moment into a pad
Hold a single instant of a chord or a texture and let it ring forever. Add smear for an ambient cloud.
Reverse and reshape
Run a sound backward at pitch, or smear it into a wash — quick sound-design textures from anything you drop in.
03 What makes it different
Ψ Lab is a real phase vocoder running entirely in your browser — no upload, no server. It is an honest experiment: it works, it has rough edges, and heavy stretch will sound "phasey" (the known phase-vocoder artefact), not broken.
Also in Ψ Lab
- Freeze
Hold one spectral moment as an endless, coherent pad.
- Smear
Blur frames over time into a Paulstretch-style cloud.
04 Roadmap
Now 01
- Time-stretch (pitch-preserving)
- Freeze
- Reverse
- Smear
- Client-side AudioWorklet
Next 02
- Phase-locking for cleaner extreme stretch
- Transient preservation
- Per-region painting
Later 03
- Per-band time control (freeze the pad, run the hi-hats)
- Clip-to-clip morphing
- Export
05 Docs · tutorials
Read the system, not the marketing.
Continue the workflow
Where this leads.
Each lab can hand audio off to the others without re-uploading. When you finish an analysis here, the → Lab buttons in the demo chrome carry your audio directly into the next lab’s analysis flow.