Here’s the reupload of the stream the other night:
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a little ditty using the decadrone, a gristlier and a copicat.
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We moved houses and I have finally been able to reconnect all the Kosmo stuff!
RFT (name of the jam) is short for rooftop, because my workspace is now under the roof… so attic would probably be the correct word, now that I think about it… 
Anyway, this is a little jam using 3 of Sam’s (modified) VCOs into the MS20 filter into the safety valve into Sam’s delay for the lead (arpeggio) and one VCO into the transistor ladder filter for the bass. Drums is drumbrute impact together with the simple stripboard hi-hat that I just finished. Hope you enjoy!
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My soldering iron is warming up to build the VCOs…
Which mods did you make ?
I know of :
- replace 220R (in series with LM4040) with a 4K7.
- add a 10M between pins 4&5 (thank you @Dud) of the 3340 to fix the ringing on the square out.
- replace 7805 with 7808 because the Arduino is powered thru Vin not +5V.
- adding 1K output resistors ? (not using the jack PCB ?).
- fixing the discrepancies between output levels of the different waveforms (how ? opamps for gain ? with the 1K output Rs mod that warrants a whole new jack PCB
) - adding a regulator for the negative supply of the 3340 ?
- C5 on the wrong side of R6.
- trim pot to reduce PWM detuning (thank you @sebastian for reminding me about this)
[Edit: added 7808 mod]
[Edit2: fixed pins 4&5, added C5/R6, added PWM detuning]
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Sorry, my modifications only make it worse! I did my own version based on the schematics, because I could not wait for him to release the pcbs. I am too impatient. So in my version I mixed up the PWM and CV for PWM potentiometers. One thing that might be better or at least not worse is that I used a TL431 instead of the LM4040 to regulate the reference voltage (for the octaves).
But is great that you collect the improvements to this design!!
The 1k output resistors are not really required, as I read somewhere here (tl072 outputs can be shorted to ground forever ;-), but yeah, adjusting the levels would be nice, a single tl072 should be enough, right? And using a jack PCB is a brilliant idea, no needs to crimp the cables and stuff! but then still some modification on the original PCB is necessary to connect the board… hmm…
There was also the idea of adding a trimpot to the pulse width control to improve the problem with detuning, but I don’t now if that is really necessary…
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if i remember it’s between 4 and 5 
Edit :
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I consider the 1K Rs as “good practice”, but for the VCO (#1222) only with a new jack PCB…
For the “improved” jack PCB we’ll need to find an easy place to pick up +/-12V. GND and the eight jack signals are already on a single connector.
Oh yes, I’ll need to look-up that trimpot to improve the PWM detuning, now I recall seeing this.
That makes a lot of possible mods…
The first three (220R,10M,7808) are so easy they are “mandatory” (for me anyway).
The next two (1K,output levels) need a new jack PCB (or deadbug wiring…), not too hard.
The regulator for the negative supply of the 3340 needs some more investigation on the PCB layout to estimate it’s difficulty level… or it could be put on the new jack PCB with a wire running to one of the pads of the (now) left out R6. Which reminds me C5 should be on the other end of R6…
I think we need a new thread, this starts to be quite OT here…
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You should post the complete list to the VCO thread 
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FOURSES Dub style - yah man. 
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So I picked up a new audio interface this week (Presonus Audiobox USB 96 - cheapest option I could find with MIDI in/out) and just got it working so I can record the synth instead of just sending it to my guitar amp and hoping my phone or camera can pick up the sound.
Turns out…that 808 kick I built last week sounds a lot more like I was hoping it would than I realized now that I can hear it properly 
Patched a few things together and just played around for a bit:
Quick and Dirty LFO though a LMNC 1161 multiiple and my click divider driving:
M4TM 808 Kick (built on a PCB I designed)
Noise Drum Hi-Hat
Lead is just the LMNC 1145 VCLFO with rate patched from the QD LFO. Controlling the 1222 performance VCO and MS20-LPF through the 2399 triple splashback and all mixed through the 1183 Quad VCA.
Pretty impressed with the wild sounds this thing spits out with just a little bit of prompting
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That’s a really nice kick!
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and accompanying video:
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I’m much happier with it now that I can hear it properly! The tone and clipping controls are much more noticeable too. Just took me a few days to find the 1/4” adapter for my headphones again so I could hear what I was doing.
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D2R2 recording ? 
cool !
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DOGSCRATCH triggering DOGVOICE - angry birds. Chirp chirp. Lol.
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I make alot of weird music, but I think moast of it can be called progressive house. Released a single last friday, and I try to have a release evry month, so follow me to get the latest stuff.
Spotify
Tidal
Youtube
I have some jams, musicvideos and live stuff on youtube as well, just click my name on the playlist as the induvidual songs are posted by my distributer.
I make a comicbook as well, if you want to read it you can, and it is free on facebook, but it is still in beta.
Facebook
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My remix of ‘Waiting for the World to End’ Hope you enjoy
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Please consolidate your posts. Discourse auto flags your posts as spam.
It’s kinda a dumb experience for new users, but I moved your cool stuff to this other thread to shut up the automated system.
Welcome to the board, look forward to more cool stuff.
Here is the part of the video I used:
And here is the finished track:
Here’s what I did to the sample:
I timestreched in Cubase to make it at the right tempo, and added a bit of compression. Then, I added a gate, where the release is short, and the threshold is gradually automated down, so more and more of the drums come through. I ran the track through my valve distortion module, then I added some EQ, more compression, and reverb. I quite liked the sound of the drums gradually coming in so might use a similar technique in the future.
Other parts of the track were made using Serum, my DIY modular, and some other samples.
I didn’t ask Sam for explicit permission to use the sample, but I am a Patron and he seems to give them all away for free on there anyway. Hope you don’t mind Sam
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