Checking/troubleshooting/calibrating the Expander is up next. Let's cross fingers (or press thumbs, as we do in Germany
) I don't have another faulty SSM2210 (in the variable state VCF, that is) - in that case I wouldn't have another spare and need to order new ones. I'll see shortly
My. MFOS. Ultimate. Is. Finished. As. Of. Today.
I first did the final checks on the Ultimate as such (external input). All fine. So I mounted the PCB to the case.
On to the Expander .
First up for testing was the VCF. Works great in all three modes (LP, HP, BP). And I actually managed to get a nice octave tracking in less than 5 minutes
. Luckily, the SSM2210 was OK *phew* .
On to the ADSR. Just two different settings (ADSR generator was triggered by the RGG in gate mode):
The signal mixer as such also worked great - except that the selecting toggle switch that decides whether the mixer or the VCA output should be sent to line out was faulty and I had to replace it. No big deal.
The ring modulator was up next. Funny sounds and beautiful patterns on the o-scope (these alone are worth playing around with a ring modulator
The 'little helper' modules such as CV inverter, attenuators, CV distributors also worked flawlessly.
That's the envelope follower (top) and the AR envelope that's feeding it (bottom). Three examples with different settings:
Time to mount the Expander PCB as well - and a final view inside:
And then I mounted the back wall, turned the synth 'round and... one last picture on the workbench:
In my home studio. Aren't they a nice pair?
I think it is now time to say a huge Thank you!
to Synthcube for making this possible and, of course, for keeping Ray's wonderful instruments and legacy alive.
I've really enjoyed the build - it was my third (and biggest so far) MFOS project, and every single one is a simply unique piece of musical instrument.
I really hope to have done MFOS and Synthcube justice with my documentation in this thread. Please feel free to ask if there are questions left open, or if you wanna see some more O-scope pics
... why buy it for $100 when you can build it yourself for $150?