#synthdiy
4 posts4 participants0 posts today
I finally managed to write down some details on my programmable analog polyphonic synthesizer. Find the blog post on my website: https://polykit.rocks/open-source-analog-polyphonic-synthesizer
#synthdiy #synth #analog #polyphonic
Just added some active circuit examples to my Edu Mod Synth Thing.
You can do some quite funky things with the Synth Thing and some Schmitt trigger NAND oscillators :)
This is part of the 6th chapter of experiments and examples now.
Still to come at some point: NAND PWM, a basic VCO, and then maybe some 555 based circuits too... and whatever else occurs to me at the time...
https://github.com/diyelectromusic/ESP32EduModHackThing/tree/main/Docs
Here is my latest finished module, the Linkz a DIY throughole version of Mutable Instruments Links. a utitlity module that can be quite good to have in your rack #diymodular #synthdiy
https://youtu.be/UwTxm2Abqs0
I’ll be at the Superbooth on Saturday and bring my 8-voice polysynth. Make sure to say hi and have a chat between 1-3pm at the SynthLab booth. See you there! https://www.superbooth.com/de/plan.html?location=o395 #synthdiy #synth #superbooth
It turns out I had not, in fact, bitten off more than I could chew, though it has taken me several months, somehow, to get round to finally fettling and racking it, but still.
(Now I can order some more, lol)
Power station for the dronebox instrument I am making. The pedals can all pull directly from 9V, but the buddhamachine I am using takes 3V. A handful of parts let me tune the output of the regulator, but it took some maths people! I did it! And it works!! Soon the box will have power!
I finally have a good enough Eurorack version of my picoDexed.
https://diyelectromusic.com/2025/05/03/picodexed-minidexed-eurorack/
This is using a neat pico-to-zero adaptor from bablokb, released on Github, which allows me to use my existing MiniDexed PCBs and module with no other hardware changes.
My Raspberry Pi Pico 2-based Dub siren now has a simple synth engine in addition to a sample engine, so its sounds now range from classic siren sounds to air horns and vocal snippets.
In this short video I show off the synth engine: 
https://v.basspistol.org/w/qmjJ3TY8Q8mEzigVywDXmt
thx again 2 @todbot
And if you haven't seen it yet check out this video for yesterday's exploration of the sample engine: 
I was inspired by @todbot's latest #CircuitPython audio effects experiments, so I had a go at incorporating what I learned into a DIY Dub siren. It consists of a Raspberry Pi Pico 2, an i2s module with stereo line out and some pots, an encoder and a button.
Check out my unfinished (but already fun) prototype here:
https://v.basspistol.org/w/pS4PrN9Wjo5eFP4hqFSpYr
NB: the case was a charity shop find.
The new audio effects libraries in CircuitPython are super fun. Here's a quick "taster" showing off some of them, part of my impending "Synthio Tutorial". Thanks Mark & Cooper for making them!
https://www.youtube.com/watch?v=nyv7XlQ1d00
#CircuitPython #synthio #audioeffects #synthdiy
The designs are up for my single-knob, MIDI controller using a Duppa small RGB LED ring and in this case a Waveshare Zero RP2040 board.
https://diyelectromusic.com/2025/04/27/duppa-i2c-midi-controller-pcb-design/
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Took some juggling but I got them going together. Success! The G&T gate-to-trigger is sandwiched between the Doepfer A160-2 Clock Div II and the Nonlinear Circuits Poultry in Motion PT2933 delay with integrated divider that can be synched to the delay steps.
Picked up two used clock dividers at Perfect Circuit so I'll be tetrising a spot for them today.
I really want the large delay / divider in the big rack but the space I have is 8hp, not 10.
My Rotating Clock Divider died and I will try to fix it, but I have momentum on other makes that I need to finish first!
The fine people from SynthLab will have a booth at Superbooth in May, and they are looking for makers who would like to showcase their DIY audio hardware. The only limitation is that it needs to be non-commercial. You can sign up for a slot at https://workish.berlin/synthlab if you are in Berlin and would like to present your work. I'll be there at some point and bring my 8-voice polysynth and maybe some other stuff. See you there! #synth #synthdiy #superbooth
workish.berlinSynthLab - workish.berlinNEXT SESSION: WEDNESDAY, 6PM-10PM SynthLab is a weekly meetup of audio hardware developers taking place right here at FabLab Neukölln. WHAT IS SYNTHLAB? SynthLab is not just a regular meetup. From hobbyists to commercial producers to first-time audio circuit creators, we offer a supportive environment for building together and sharing knowledge. We build stuff right […]
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Here's the left side of the 1U strip. I used to have a bigger module here that was not working well so I installed a homemade passive ring modulator (closest to the right) and a 2x2 matrix mixer with multiple format input jacks.
I never painted a panel decoration for this, so I am testing it to make sure I know which jacks are which, inputs or outputs, and why I put that switch there. I am not sure I have the same paint pens, but I want to try and put a UI on it. 2/2
I have my homemade 1U strip out to figure the order of a series of jacks I installed a little while ago. This pic is the other side, where I have an attenuverter, an fx pedal interface, and a dual signal inverter. 1/2
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#ObliquePalette #Eurorack #modularsynth #synthdiy #plugdata
Ask me about it at #Superbooth! Maybe I'll even have one that works!
The #ObliquePalette v0.5.3 is off to manufacture!
It'll fit in a #Eurorack #modularsynth case if you like. And it reads and writes voltage control (only 0:5V currently, but ±5V in the final, we're hoping). You’ll be able to plug your #synthdiy weird things into its eight inputs, which you will then interpret with a #plugdata patch.
And your patch will obey your creative wishes, making sound with your computer audio and sending out 8 channels of CV and servos*!
*We'll see how many we can run!
Today's build I got each pedal more or less secured to the brackets, securely mounting them will happen after all these wires make sense. The middle circuit board will be a patch station to connect them. Power still to come.
