It is finally done, my Midibox NG powered analog synth hardware is finished. Usually, it runs pretty smooth with some occasional hiccups. Unfortunately, the power supply is off by almost half a volt on the +15V rail, so I have to re-tune everything. So, there is still some work to do. The next step will be to finish the software by figuring out a lot of stuff like an individual menu structure, free detuning of my second and third oscillator as well as preset save and recall and sending presets from and to the midibox by sysex.
Thank you all very much for your support! I would never have come this far without the help of many passionate synth builders and midiboxers. I'd love to also post some samples. But since our first baby is due in the next couple of days, I can't promise much for the next days, weeks or even months. But stay tuned. I promise, some sound will eventually get posted. Until then, enjoy your hobby and see you soon :-)