Tubbutec Juno-66 User Manual Remix

Recently I found myself attempting a couple of the old Roland Juno-60 tricks and discovering that since I had the Tubbutec Juno-66 MIDI upgrade installed that I was out of luck. What I wanted to do was the old school chord mode where you play a chord, press the hold button, and then the Key Transpose button, and now we are free to play the chord from any key, or a remote sequencer. It’s a great trick, but with the Juno-66 installed, the Key Transpose button has been converted into the programmer key and so it doesn’t work.

The other thing I wanted to do was to try the monophonic Juno trick – switch off the Juno 6 or 60, and power it up holding down the key transpose. This puts the Juno into monophonic mode. All 6 of the voices are stacked and it makes brilliant bass. Sort of like Unison mode on a Jupiter-6. But again, because the Key Transpose button is being used by the MIDI upgrade I was out of luck.

So I got out the manual and got into it, trying to determine what Mono mode A vs B was, and how to use the chord features. I love Tobias from Tubbutec, his work is inspirational, but his manual writing skills are a little confusing. That’s not really a critique, can you imagine me trying to write a manual in German? Hahahaha… what fun!
So I set about deciphering what these paragraphs were supposed to mean, I wrote to Tubbutec and asked for some clarification, and posted a few clips to my instagram and described my explorations.

By the time I was done exploring, I wanted to go back and use some of the cool features I had discovered. Well, it’s typical of me to have completely forgotten what I learned, despite my efforts to retain it all by helping others understand, so I had to begin again. This time I took notes. Those notes turned onto this remix of the Tubbutec Juno-66 manual for Firmware 1.29.

Tubbutec Juno-66 User Manual Firmware v.1.29
Remixed by Sunshine Jones
Version 0.1E | PDF format document | Suitable for 8.5×11 double sided booklet printing. Full or half size is fine.

Companion Cheat sheet reference
PDF format document | Single page, intended to be folded long ways for quick reference.

I’ve sent this manual, and my cheat sheet to them, and they are free to use it as they see fit. In fact, this has been so much fun, and I’m so glad I did this, that I will be taking another look at the Mody/Poly upgrade and preparing to produce a few tutorials and remix that manual too. There are just too many good heads out there with these brilliant MIDI upgrades who don’t know how to use them (like me) because the manual is confusing (and that makes us feel stupid) and then we give up.

Let’s change that.

Learn all you can. Explore deeply. Share what you find.
Make music! Play live!



  1. gauthiersoubirous:

    Thank you for this !!
    And I just figure-out that you are also the author of the article about Korg Nano Kontrol for octa + juno66
    I really enjoy your articles !

    Cheers from France !

  2. Pony Boy:

    My dream in 20 years is just to be you fr dude

  3. autoy:

    “The chord can be arpeggiated” was a highlight of the Polysix for me. Yes this mod is coming home soon hopefully

  4. soundgas ltd:

    Inspiring and enlightening post (my Juno doesn’t have Tubbutec, but interested to see what it adds – I should add that I’m not the deep synth tech/midi person here, more old school trigger/clock/sync these days)

  5. part_time_tennis:

    This is amazing thank you

  6. enoughstatic:

    PowerARP feature is awesome. I use it on the PolySix often!

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