Wavetable Assembler V2

The original Wavetable Assembler did one job: concatenate a set of imported Single Cycle Waveforms (SCWs) into a single wavetable. With this update, it has been rebuilt from the ground up into a complete wavetable builder — covering waveform generation, spectral and time-domain effects, frame arrangement, and morph-based wavetable design, all in one free browser-based tool.

What’s New Compared to the Previous Version

• Flexible SCW import — Single Cycle Waveforms of any length can now be imported, including sets of waveforms with different lengths per frame. The previous fixed-length restriction is gone.
• Audition mode — Play imported or generated waveforms directly from an on-screen keyboard. Switch between previewing a single SCW and previewing the assembled wavetable as it morphs across the keyboard range.

Single Cycle Waveform Generation

• Basic waveform presets — Generate saw, square, triangle, and sine waveforms as a starting point with one click.
• Randomized generation — Create waveforms from a randomized harmonic spectrum, or from random curve/line-segment shapes, for quick experimentation and happy accidents.
• Draw tool — Sketch waveforms freehand, or with straight-line and curved-line drawing modes.
• Additive synthesis engine — Design waveforms harmonic-by-harmonic with an additive synthesis engine supporting up to 1024 partials, with direct control over each harmonic’s amplitude and phase.

Effects for Single Cycle Waveforms

• Spectrum FX — Work directly on the harmonic spectrum: remove even partials, isolate prime-numbered partials, thin out partials, and shift, zero, randomize, or smooth phase — plus harmonic stretch and dual-shift operations for spectral reshaping.
• Effects — Reshape the waveform itself with Phase Distortion, Phase Modulation, PWM, Wave Folding, Drive, Sync, and AM/RM processing.

Frame Rearrangement and Copy/Paste

Frames can now be copied, pasted, and rearranged freely, and the editor implements two distinct workspace modes: TimeLane and Keyframe.

TimeLane Mode

Build a wavetable with up to 256 frames. Import multiple Single Cycle Waveforms at once, or import an existing wavetable in a single pass (2048 samples per frame). Individual frames can be sampled out of an already-imported wavetable and reused as standalone SCWs, letting you resample and recombine material from existing wavetables into a new one.

Keyframe Mode

Designed for building morphing wavetables. Place up to 16 Single Cycle Waveforms as keyframes, and the frames between each pair are interpolated using a two-stage morphing pipeline:

1. Spectral morph/warp stage — crossfade, zero-phase, spectral-wander, spectral-ripple, spectral-drift, soliton, KdV dispersion, and slink algorithms control how the harmonic content transitions between keyframes.
2. Effect stage — Phase Modulation, PWM, Phase Distortion, Sync, Drive, and Wave Folding can be layered on top of the morph, with their intensity swept across the transition for organic, evolving timbral movement.

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Wavetable Assembler is free to use directly in your browser — no install required.