Module is available as a DIY project only.
No info about availability.
Toppobrillo Triple Wavefolder DIY (TWF) with Grayscale panel
The Triple Wavefolder (TWF) module contains three independent, voltage-controlled waveshapers that were designed to accomplish simple but useful waveshaping tasks, as well as combine to produce a nearly infinite variety of complex non-linear synthesis functions such as those implemented by the Buchla and Serge modular systems in the 70's.
This panel will fit existing factory-built Triple Wavefolder (TWF) modules, and will also work with the DIY PCBs available from SynthCube and Thonk.
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These merchants probably sell this module. Huh?