My second Patch SM based module is just about ready to release. It’s called dSpec. It’s a dual VCO based on direct spectral synthesis. It builds waveforms additively in real-time with CV modulation over more than a dozen parameters. It has an 8 octave range from A0 to C8. This is the intro video: https://youtu.be/TB4MDX-yLJ4?si=KS9YqZksWjZRwNEn
It’s also available in VCVRack (free) which is where I did most of my prototyping.
The user manual on my website: