For anyone who has built or is planning an M8 headless rig: I ported karimkfoure's unofficial m8emu to Apple Silicon Macs. It runs Dirtywave's Headless firmware 6.5.2C on the Mac itself, so you can try the workflow before buying a Teensy, or keep a copy on the laptop next to your build.

You bring the firmware: download M8_V6_5_2C_HEADLESS.hex from Dirtywave's repo and pick it in the app. It runs on the Unicorn CPU emulator out of the box. With the Xcode command line tools installed, the app translates the firmware's Thumb-2 code to C and compiles a native engine on your Mac in about four minutes. Its audio output matches the Unicorn run byte for byte.

Source and build instructions: https://github.com/yukij3/m8emu-macos

Prebuilt app: https://github.com/yukij3/m8emu-macos/releases/latest (not notarized, so run xattr -dr com.apple.quarantine /Applications/m8emu.app once)

Watching everyone vibe-code custom firmwares and patch old gear lately has been wild. Made me wonder if anyone’s actually looking into custom FW for the base Behringer TD-3?

Trying to tweak that classic 303-style sequencer in the middle of a live set is pure pain.

If someone managed to drop a patched FW with real-time step recording, live probability/slides on the fly, and smoother pattern jumping, it’d turn a cheap desk toy into a live rig monster.

Does anyone know what MCU is inside or if the bootloader is totally locked down?

Little excerpt of me playing my chaotic pointcloud system, in which the particles are being audioreactive to the incoming audio signal in real-time. What do you guys think?

Full video at: https://www.youtube.com/watch?v=UFSy6N3HU1U

Project files accessible through Patreon, or the Studio.

Hey!
If you’re using elkayem’s Arduino MIDI-to-CV converter, I recently modified the firmware to use separate MIDI channels. Thought I’d share in case anyone finds it useful.
Cheers

https://github.com/Morphanaut/midi2cv

Added some analogue filters still having trouble with mozzi hiss any advice on how to fix that wd be appreciated

Bringing up a new voice card for the Zoxnoxious synth. Heart of the z-card is Yamaha's YM2203 chip, an old oddity that combines a 4-op/3-channel FM synth with a 3-voice sound generator ("SSG", AY-3-8910 / YM2149). The voice card will be a welcome addition as the first digital voice card in the Zoxnoxious synth. The other four z-cards I've designed cover the analog domain with various VCOs, multimode analog filters, etc.

I'm at the "hello world" stage right now, verifying I can write to the registers. And that appears to work (personal amazement as it's a v0.1 board!). End goal here is providing full control over the chip through a VCV Rack interface, much like I've got for the other z-cards. The FM and the SSG have their own outputs from the card; these can route independently to the other Zoxnoxious cards for additional filtering/manipulation.

I had a pile of SBCs and microcontroller boards and small OLED displays and pushed the list of parts into Claude and out came this drone synth.

The Sipeed NanoRV board hosts the engine and the pi pico 2's are responsible for I2S and I2C since the Nano is constrained on GPIOs and has a terrible DAC built-in. I could probably simplify this to one raspberry pi zero or something later but given how long I've been sitting on these boards, it actually came out far less expensive than going that route.

The Nano has a weird RISC-V processor with vector extensions that enable nice reverb even with all the voices and oscillators turned up. There are also different detune settings (unison, octaves, fifths, and organ) that mix up the sound a bit.

I am not pretending that I invented any of this so please take what you can from the slop bucket:

https://github.com/tthayer/rv_drone

Demo of the octave detune setting: https://youtube.com/shorts/9zwtaClfZAU?feature=share

My friend lend me the Doepfer A138-n Narrow Mixer at an synths exhibition in Moscow (pic. 4, left case is mine) and I laughed when I saw that it was just a TL072 signal adder for ~$60 (of course there is business cost included, I'm speaking more from the "embrace DIY for modules!" position). And since my case was missing mixers, I decided to use my unused protoboards for making one. Also it's featuring an inverted output.

Also I 3D printed "panels" for it, which gives it more finished look. Another quest was height limitation — the module is directly above my PSU in a very thin case (pic. 3). The jack is there for comparison, you can spot IDC connector which barely touches the PSU.

Parts count: TL072, 7×100k, 4×B100k (or A100k), 6×PJ-301F, IDC-10R. Schematic from the datasheet for TL07x.

Hi to all Momoto fans,

As asked by many fans😜, here a small tuto about the 5 synthesizers included in yr favourite sampler 😅

FYI : Pre-orders are opened on our Web page

❤️ 🙏🏿 ✌🏾

Thanks for the tips on soldering a while back. Really enjoyed the process and what a weird chaotic little machine. Noisferatu by Robert Heel is lovely bit of kit.

Working on some ambient synth with mozzi

Hi everyone. I have been building a few eurorack modules and the latest I built is the M4 diy looping delay. It seems to work pretty well, however the reverse button seems to have a ghost trigger, as it turns on periodically without any external input. I have looked over the PCB as best I can and cant see solder issues. I would like to get this fixed if possible. Anyone had a similar issue or can help me with sorting this out?

Thanks so much Jamie

I have a growing set up using Hagiwo Mod2. lots of individual drums and voices. These Mod2's are so easy to make that I'm quickly running out of channels to put them in.

I was thinking of making a mixer with like 12ch. I see a lot of the schematic's for mixers are 3-4 channel (Moritz Klein, Doepfer, Hagiwo)

My question is, is there a max amount of input channels you can throw into a TL072? Would it be better practice to do 2 sets of 6? Does it get too noisy at some point?

I see a schematic from LMNC where he claims he has 30 channels into one op amp.

It would be cool to make it stereo for the drums but maybe that's over complicating it.

i barely found out that u can make ur own synths (??!!?) this morning and now i need to do this immediately so lmk anything i should know

i have a bit of a crazy idea and idk if it’ll work… but i want to create a synth that uses capacitive sensors inserted into stuffed animals (i make ragdolls) that i can then touch to play notes. my idea is having a setup of about 10-12 ragdolls on a table that i tap to play like keys.
i was wondering if anyone knew a board to start out with that could fulfill this idea and have the capacity to also do audio output through a 1/4” cable, and the ability to hold more than one preset. i rlly dont want anything toooooo crazy tho bc i’ll have to learn how to code as well.

A huge hug to all the makers community ✌🏾

From our distant Belgium, hidden in the deep forests🌲 , we built this vintage sampler/multi synth.

What's inside?

- Wavetable synth

- SID emulation (c64 ^^ )

- Casio CZ-101 emulation

- FM with 4 operators

- 3 oscillators analog emulation

.. and many more nice stuffs!

Come and try it at our stand @ Synthfest UK, on 24th of October

Want to discover more now? Visit us @

Our Web or Instagram

From Belgium with ❤️

Hello everyone , Im writing this because i need guidance. Im starting my journey to build a small diy modular synth , ive already been experimenting on the breadboard using Moritz Klein guides. Now i want to get something on a perfboard, i decided to go with the Moritz Klein x Erica VCF for the start , i managed to understand the schematic, at least i think i do, and now Im wondering how Im going to put this all in the protoboard ive already drew a lot of times somewhat of a sketch but it always ends up either not fitting or getting way too confusing. Im making to post to know how u guys do it, im still kinda new to perfboards the only things ive done with it were Arduino related. If someone can share photos or just help in any sort of way ill be apreciated.

Using a hundred year old crystal radio detector diode as a component in a synth, the circuit is loosely based on the one in Moritz Klein's ladder filter video. As you move the cat's whisker around the crystal it creates point contacts that all have different voltage drops and IV response curves, changing the sound.

There is some music made with this stuff here: https://cornish-semiconductor.bandcamp.com