I have just released the VCVRack version of my new Eurorack module. It's a direct spectral synthesis VCO and is a lot of fun. It has an 8 octave range and allows tons of modulation. The hardware version is pretty much ready to go but with tariffs and logistics I am not quite ready for a production run. If you are interested info is here https://www.gregsbrain.co/dspec.html
I have PCB's and parts for some DIY kits. Ping me via my website for info.