Purpose

Wavetable Synth is a polyphonic instrument that scans through wavetable frames, plays tonal sample loops, or generates granular pad textures. It ships with 8 built-in procedural timbres (saw, square, organ, formant, soft, bell, metal, choir) so it produces sound immediately. Load any WAV file via Sourcepath for custom wavetable material.

TouchDesigner Use

Wire note_voices_f32_v1 from MIDI Note, a chord voicer, or any note-voice source into the voices input. Choose a mode, set Position to scan through the wavetable, and adjust Brightness and Motion for evolving timbres. Optionally set Sourcepath to a WAV file or folder for custom timbres. Wire the stereo audio output to Device Out, an effect chain, or a mixer.

Inputs And Outputs

• Input 0: voices — note_voices_f32_v1 (required). Gate, pitch, velocity, and aftertouch per voice.
• Output 0: out — stereo audio (PCM f32).

Main Controls

• Sourcepath — Path to a WAV file or folder for custom wavetable material. Empty uses the built-in timbres. When a folder is provided, the first WAV file (sorted alphabetically) is used.
• Mode — Playback engine: wavetable_scan (scan through wavetable frames with Position), sample_tonal (pitched looped playback of the loaded WAV), granular_pad (granular cloud texture from the loaded WAV).
• Rootnote — Root note for pitch mapping. Adjusting this after load rebuilds the wavetable frames.
• Position — Wavetable scan position (0-1). In wavetable_scan mode, sweeps through the available frames. In granular_pad mode, sets the grain source position.
• Brightness — Post-synthesis brightness filter. Also affects grain length in granular mode (brighter = shorter, tighter grains).
• Attackms / Releasems — Amplitude envelope attack and release times in milliseconds.
• Gain — Master output level.
• Drive — Saturation amount.
• Width — Stereo pan spread across voices.
• Detune — Per-voice pitch detune in cents for thickness.
• Motion — LFO-driven scan modulation depth. Adds autonomous movement to the wavetable position. Aftertouch also modulates this.
• Voicesafety — Automatic per-voice gain scaling (divides by the square root of active voice count) to prevent summing overload.
• Limiter — Output safety limiter.

Notes

• Up to 8 polyphonic voices.
• Built-in timbres are generated procedurally at allocation time (no external files required).
• Wavetable frames use mip-mapped tables with periodic edge blending for click-free scanning.
• Each voice uses two slightly detuned read heads scanning different table positions for stereo depth.
• In granular_pad mode, 3 grains per voice with Hann windowing and staggered respawn produce a smooth cloud texture.
• Aftertouch modulates both the wavetable scan position and the brightness filter for expressive performance.

Parameters

This operator does not expose user parameters in the extracted schema.

Catalog metadata

Roles

• transform
• instrument
• synth
• generator

Tags

• wavetable
• granular
• pad
• texture
• note_voices
• stereo

Search groups

• midi
• control
• audio
• music
• instrument
• synth
• sampler