Wavetable Lab

A wavetable workbench for hardware and software synths, by @stvemillertime.

Use it now: https://stvemillertime.github.io/wavetable-lab/

Wavetable Lab builds 2048 × 64 wavetables in the browser. Nothing to install, no account, no server: your work stays on your machine.

• Draw keyframes from band-limited shapes, harmonic sliders, math expressions, freehand, or nodes joined by bendable curves (Vital-style)
• Import single-cycle waves, whole wavetable WAVs (Serum clm and _wt1024 names are recognised), Surge / Bitwig .wt and Vital .vitaltable / .vital files, or resynthesize frames from any sample or a microphone recording, with an optional second sample morphed in
• Vocode resynthesis lays a sample's spectral envelope over a harmonic series, so drums, noise and speech become pitched tables
• Turn an image into a table: each line of pixels becomes a frame, read as a harmonic spectrum or as the waveform
• Morph between keyframes (spectral, node shape, or crossfade) and run a chain of transforms (fold, sync, rectify, squarify, random amplitudes and more) that moves from a Start to an End setting across the table
• View the table in 3D or as a spectrum, and paint harmonics directly on the spectrum; a health lane underneath marks loudness and brightness jumps between frames
• Pick a range of frames (Shift-click or drag) to copy, cut, paste, insert or duplicate, even between bank tables; join frame ranges of two tables into one, or ring-mod, FM or vocode the table with another
• Play it on a polyphonic preview synth (unison, filter, envelopes, LFO on the scan position, with an output scope) from your computer keyboard or a MIDI keyboard, with a MIDI CC for the scan position
• Start from the factory Library or your own saved tables (name, tags, favourites; kept in the browser), or let Generate make seeded random tables, mutations of the current one, plucked strings (Karplus-Strong), logistic-map and Lorenz-attractor spectra, and cellular automata
• Branching undo History: jump to any step, pin snapshots and A/B them against what you're editing
• Export with templates for the Elektron Tonverk, Serum / Vital and other DAW synths, the Elektron Digitakt II, the Arturia MicroFreak (up to 32 frames), or plain WAV, or as a Surge / Bitwig .wt or Vital .vitaltable, and save a PNG of the spectrogram
• Collect tables into a bank and export it as one ZIP, with optional loudness matching, a README and a printable report
• Save and reopen projects as .wtproj.json; your session is also autosaved in the browser
• Share a table as a link: shape, formula and node keyframes pack into the URL itself, so nothing is uploaded

Run it offline

Wavetable Lab is a single self-contained file. Download index.html (Raw → Save As) and double-click it. It works from file:// in any modern browser.

Hosting

The site is published by GitHub Pages from main using the Pages workflow. In the repository settings, set Pages → Build and deployment → Source to GitHub Actions.

Hover help

Hover any control, canvas or panel and the status bar at the bottom says what it does, when you'd use it, and its shortcut in parentheses, e.g. "(P)". The text lives in a data-tip attribute on the element (or the nearest one around it, such as its <label>); put data-tip last, after the id and other attributes. A title works too: the page moves it into data-tip. Controls built by script set data-tip in their template or el.dataset.tip.

Check that every control in the page's markup has a tip (it exits non-zero on a gap, and lists them):

node tools/tips.mjs --strict