I was inspired by the following video to build an audulus clone of the Dewanatron Hymnotron:
Here's my attempt at part of it (attached).
There are 2 components: the chord maker and the voice.
The chord maker outputs frequency values that build a simple just intonation chord starting from a specified root note. There are a couple of modulations for it, allowing you to perform intervals, minor chords, suspended chords.
The voice consists of 4 wave folded sinewave oscillators, each with 3 stages of wave folding. Each one has a sine wave LFO that allows you to modulate the wave folding (which is way toned down compared to what the built-in way folding module is capable of). The LFO frequency is in the orbit section, and the mix values are in the nimbus section.
In theory it should be possible to build a MIDI interface that will allow you to interact with the chord generator the way Leon does in the video, but I haven't even started that.
FYI This is a nice oscillator mixer that @RobertSyrett created that auto-compensates for levels (so if you turn down one of the oscillator voices, the rest rise up and automatically stay between -1 and +1).
To use just 4 inputs, turn down the last two all the way.
Thanks. And yes, it's pretty exciting. I'm loving the µStuff and the standalone things coming out. I actually got back into it because I was considering building a Benjolin (hardware) and saw that there was a clone.
Then I saw the 0Coast clone after having played with a 0Coast at Moog this summer.