A simple synthesizer where the oscillator is determined by a user-defined path.
Download it for Windows or macOS from the releases page.
Here is a YouTube video showing the plug-in operating:
To understand the idea better, check out these great blog posts by 1ucasvb [1] [2].
There has also been some similar work published previouly in Continuous Order Polygonal Waveform Synthesis and The Geometric Oscillator: Sound Synthesis with Cyclic Shapes