6m0d6 – Production progress November 21

Here is an update of the 6m0d6 module production progress.
Since we showed the module at Superbooth and started taking preorders we have:

  • Received all switches for production
  • Received processors for production
  • Received several small parts such as screws and nuts (we use very fancy nuts for the pots)
  • Finalized the front panel, had a sample produced and ordered panels for the first batch
  • Finalized the PCB. We implemented a few improvements to reduce noise and allow even better dynamic playing (video coming soon). We also had to change to another opamp footprint (part shortage, see below)
  • Confirmed the final design by building yet another prototype (rev 5) and ordered all PCBs
  • Improved the software and now have velocity control via midi
  • Designed and build production tooling (like soldering jigs), created assembly instructions.
  • Talked to our assembly house here in Berlin so they can start production.

Bad news: We are still waiting for the potentiometers and do not have a confirmed ETA just yet.

Good news: We will start with SMD production nevertheless, so we can perform the final soldering step as soon as the pots arrive. We are very happy that despite the current shortage of electronic parts we were able to source all components and can start assembly. Some parts were incredibly hard to get (for example processors, opamps) and cost us many hours of research, nerves and board redesigns.

Update: 18.11.21:

We received the PCBs and all parts are now being sent to our assembly  house.

Hohner Rhythm 80 Midi with uniPulse

This manual describes how to use and install the uniPulse midi interface in a Hohner Rhythm 80 drum machine.

Installation requires soldering some wires and drilling holes for the midi socket. However no need to cut any traces.

midi socket installed in a rhthm 80

Picture by Beatkamp

After installation you will be able to trigger all sounds via midi, most velocity sensitive.

Bass Drum
Low Conga
Low Bongo
High Bongo
Cow Bell


Unplug the Rhythm 80 when working on it!
After opening up the enclosure, you are presented with the following view of the boards:

Continue reading

Hohner Automatic Rhythm Player Midi

This manual describes how to install our uniPulse midi retrofit in a Hohner Automatic Rhythm Player.
After installation you will be able to trigger all 10 sounds, most of them fully velocity sensitive. You will not be able to sync the internal rhythms to midi clock however.

Soldering pulse triggers

Installation is fairly simply and requires you to solder 10 wires from uniPulse to points on the Rhythm Player voice board. These are P1-10 and CV (as labelled on the back of the uniPulse board). The black P7 wire is not used.

Unplug the machine, remove the slotted screws and open it. Then solder the wires as shown in the following pictures. The “CV” connection used for the Maracas needs an additional diode. Any Diode is fine here. As you can see, the cathode of the diode (marking) connects to the cathode of the existing diode.

Installing uniPulse GND and VCC

The supply voltage connetions for uniPulse are GND and VCC. Note that the GND wire is red and the VCC wire is brown, unlike normal conventions.
The following pictures show the locations to solder the VCC and GND wires:

INstalling the midi socket

In order to install the midi socket you need to drill 3 holes. A stencil for drilling is provided. For the large hole you can use a stepping drill. Now mount the socket using the screws provided.

Mounting the unipulse board

You can mount the uniPulse board anywhere in the machine. We decided to use thick double sided tape to mount it on the rear. Make sure the board can not short to the metal chassis.

first start

After installation, plug in the machine and turn it on. The LED on the uniPulse board should light up indicating proper power connection. Using the uniPulse configurator tool, upload config file for the Hohner Rhythm Player (zipped, extract before opening in the configurator)

That’s it! have fun!

How to open unsigned app on OSX

This is how to open our Firmware updater utility on OSX. This should work with any other unsigned app as well. This has been tested with OSX Big Sur but probably works with older OSX versions as well.

Step 1:

Download the app. Safari will place it in the Dowload folder. Navigate to the Download folder in Finder.

Right click on the file and select “new Terminal at Folder”

Step 2:

A terminal window opens. Type the following command: (you can copy and paste it here)

sudo chmod -R 755 ./

You will be promted for your password. Enter your password – it will not be visible. After entering your password press enter.

Step 3:

Open the folder with the little arrow on the left, right click on the “Tubbutec Firmware Updater” application and select “Open”

You will see a message that the file can not be opened. Click Cancel.

Step 4:

Repeat step 3! The second time you click open, the following window will appear.

Click Open and the app will start 🙂