Take two VCOs playing the same patch, but with different characteristics (shape, octave, pwm, whatever), and send the audio out to the inputs of the XOR. You’ll get a weird new sound that should have a lot of morphing motion in it.
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Yes it’s Ring modulator effect, but it’s true that it could look like distortion
I 
the sea 
with whale 
sounds!
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I breadboarded the astable multivibrator. Swapped the 1µF and 220µF electrolytic capacitors to see the difference in the flashing. Made the fatal mistake of showing it to my wife, who asked what it was for. Answering, for practice, didn’t appear to cut it… 
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exactely like my parents for my modular. I tell them it’s to make music 
but they are not really convinced (blip bleep blop bip ! )
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Muaha same for me, They really wonder if some semblance of music will ever come out of my circuit mess, and I try explain to them that it’s not like baking a cake but that it takes a little more longer time. Generation gap… 
About girlfriend, Actually I do not have time anymore for a relationship, my synth addiction is so high, and I prefer make burning my brain with my breadboard and fighting with my circuits rather than arguing for a ridiculous love story… Anyway the day I meet one she will ask me to choose between her and my soldering iron.
I prefer to be faithful to my synth, is it serious doctor? 
(ironic, But not too much anyway… )
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built these last Sunday . just wanted a box to put stuff in for testing / adjusting on the bench , so i got carried away again …
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I have done very little this last couple of months, even with having a full week off I managed to keep myself busy with other stuff.
got the safety valve on the way, and did start planning a new big case.
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Very clean work, not like me with my not completely straight cut 
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Nice built with accompanying spools of patch wire!
And some interesting modules to go! I take it the eyes, ears and horns are controls?
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I have been debugging a circuit for 2 weeks now and finally found the causes of it not working properly. Luckily the circuit consists of 2 parts (it is a dual envelope follower) that are (or should be) exactly the same, so I could measure in one and check in the other. But I found some very odd behaviour that was not consistent which made solving the problem difficult.
There was a signal that all of a sudden had a negative DC-offset. The same signal under different circumstances had a positive offset but was lower in amplitude than in the twin circuit. When only connecting one input signal, still both outputs carried a signal!
Problem number one turned out to be a short between 2 tracks on a strip board. I’ve coloured one strip of coller black in the picture. That short piece is connected to the strip to the left of it I found. This is not visible under a magnifying glass, not even using a watchmakers glass. I could measure a short but not see it. Only by ‘breaking’ the tracks at strategic places (and reconnecting them with bridging wire) was I able to find the location of the short. I can still NOT see it!
One would think that one such bug is enough and the circuit will work from that point on, but no, no such luck. One of the inputs (pin 9) of the TL074 in the 2nd picture (the one on the left) turned out to sometimes not connect to the strip board because the ic-socket was faulty. I’ve never ever encountered this before (in many years of DIY-electronics). Replacing the socket would be quite a bit of work, so I took the obvious route to solve this.
The wretched thing is working finally. The most annoying bit here is that the problems were not caused by me wiring stuff in the wrong way, but because of the components I happened to use!
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I only buy cheap things, only when it comes to solder, I don’t compromise and buy some with 3.5% flux. If you’ve used this once, you’ll NEVER want anything else !!
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I love this Module !! I built it too, the grainy is a little less loud but i like its character !
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This morning, I ordered bits to make some super simple oscillators. Thought I’d try and lay three out on a Fritzing breadboard in anticipation.
While doing this I realised that they use B10K pots, not B100K pots. I don’t have any B10K pots and didn’t order any. 
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I have been in the trade for 40 + years and have the good tools , so I better be able to make a straight cut 
. they are still a little rough if you look close , but using scrap and building in a day has its limits .
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The VCA schematic is posted on kassutronic’s page: Kassutronics: Discrete VCA
It’s a modified and simplified Yusynth Simple VCA.
index.thml
Are you using matched pair transistors in your build?
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