This is a post about our current production status of the 6m0d6 module. I am writing this because many people asked for an update …

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Last month there was a lot of progress, you can read about it here:
6m0d6 – Production progress November 21

Since then we

– Received the panels
– And have a date for the SMD assembly. End of this week and the coming week our boards will be assembled by a company here in Berlin.
However we are still waiting for the potentiometers, so they can not do the THT assembly yet.
– We are still busy though: Working on a printed manual, finishing the firmware, taking care of packaging and distribution.

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.

After more then 2 years of work together with LPZW modules, we are very happy to finally reveal out next eurorack module on 13th of September 2021.
We will present and show the module at Superbooth. Visit us at our booth and check out the presentation on Thursday, 16th !

The incredible Sunshine Jones took our Juno-66 user manual, improved the design and added more info for clarity.
The result can be found on his website. There is also a nice cheat sheet you should not miss.

Additionally he made a few short video demos of specific Juno-66 demos:

Arp and Powerarp

Chord Memory and Polychord

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 🙂

Acid Jam Session using Eurorack for the Acid sound and Bassdrum.
A Beatstep Pro syncs a Roland TR-505 and A Korg SQ-1 using Tubbutec USB Bridge A.
A second USB Bridge A is used to connect a USB midi keyboard directly to the Novation Peak.

In depth review of Tubbutec µTune and expander by Synth DIY Guy
.
He used the Linnstrument in MPE mode to microtonally control his modular setup and show a lot of µTune’s features.

Introduction to Colundi

Some users of our µTune eurorack quantizer and midi interface have asked if about the Colundi scale and how to use it with µTune.

Here is a quick tutorial how to set it up.

The Colundi Scale is somewhat different from traditional scales in that it consists of absolute pitches, rather than relative intervals.

There are different Colundi scales, in this tutorial we will use the list published here:
http://colundi.net/data.php

The scl. file we created using these frequencies can be found here:
Colundi scl file

Update: Here is the scl-file for the complete final list with 128 frequencies:
Colundi-full-everyOne.scl

At the end of this tutorial, we will show how to create such a scale file yourself.

Using a Colundi scale file with µTune

Using the Colundi scale file is pretty simple with µTune. This explanation might look complicated, but it is only very detailed.

1. Put the scl file on the SD card an load it in µTune
   (Alternatively you could use µTune’s scale editor and enter the scale manually)
2. We need to define a reference frequency used by µTune’s tuner:
   As a reference you could use the lowest note (10.8Hz), but probably more practical is to use a note in the audible range. Looking at the list of frequencies again, we notice that note number 30 is supposed to be 440Hz. Great.
   Go into TUN->Scale Mapping and define out reference note to be 29 (The base note is note 0) and the reference frequency to be 440Hz. (Note: You can use any other note and frequency as a reference)
3. µTune is now able to calculate all absolute frequencies of your scale.
4. Connect the output of your VCO to µTune’s GATE-in input. This can be used to measure the VCO’s frequency.
5. In µTune’s tuner, you can use different display modes. You could display the frequency in Hz and check the frequencies of the different notes. Better is to use ‘relative mode’ to display the difference between the expected and measured frequency from the VCO.
6. Adjust the Tune knob on your VCO until it is in tune. You might have to adjust The ‘Middle volt’ and ‘middle note’ settings to get the VCO in range. Please refer to the µTune user manual chapter ‘Scale Mapping’ for a detailed explanation.
7. You can now play your Colundi scale and have fun!
8. Optionally: You can now also use the ‘automatic tuning’ feature to make sure your VCO stays in tune automatically at all times

Creeating a Colundi scale file yourself

As you can see, the first frequency is 10.8Hz, followed by 33Hz, 33.8Hz, 55Hz,…

We now have to convert these frequencies into ratios based on the base frequency and calculate the difference in cents.
By the time of writing this, in Scala you can enter the frequencies directly, Scale workshop does currently not support this however. A simple Excel script can do the job for you as well.

Our base frequency f_base = 10.8Hz which we define to be 0 Cent.

The cent distance from our base frequency can be calculated as:

cent = 1200 × log₂ (f_n / f_base)

The cent value of out next frequency f₁ = 33Hz can therefore be calculated as:

cent₁ = 1200 x log₂ (33Hz / 10.8Hz) = 1933.72165 Cent

The next entry in our scale is:

cent₁ = 1200 x log₂ (33.8Hz / 10.8Hz) = 1975.19032 Cent

and so on.

When you are done you can use your list to create an .scl file. You can do so using Scala, Scale Workshop, µTune’s scale editor or a simple text editor. The .scl file format is very simple and described here.