Posted this on my instagram, but figured this would probably be a good place to post it too in more detail. I love my Juno-6 but its sound has always been not quite right to me, particularly not as full as Nils Frahm gets out of his Junos. Today I finally decided to just open it up and see what I could do myself.
Turns out the adjustments I really wanted to do are extremely easy and require no special expertise. Just a screwdriver, steady hand, and your ear.
So for those interested who own a Juno-6 or Juno-60, try this:
Pictured above in blue are the adjustment pots for sawtooth width and level. My sawtooth has always been way quieter than my squarewave which bothered me, turned the level pot all the way up and now they’re even! The width slider is what’s really interesting though. At first when I was just testing the sawtooth alone one note at a time, I literally couldn’t tell a difference when adjusting this, nor could I really see a noticeable change on my scope plugin (admittedly not a great one). When I tested it with the square wave turned on in addition to the saw, with some plucky env sounds running, the difference was HUGE. There’s a little pointer nub that sticks out of each of the blue trimmers. I don’t know where mine was originally set, but I suspect it was pointed either east or west. When I adjusted this to point south (and slightly west in my case, tune with your ear to your liking)…BOOM, instant fuller Nils Frahm sound. So cool.
Pictured here you can see two holes in the circuit board near each other. Behind these holes are more adjustment trimmers. The one on the right controls the square-wave pulse-width. This one you really have to use your ear and it can be a little tricky to adjust, but it was another case of night-and-day for making the sound richer and fuller when adjusted properly.
The Juno still needs a fair bit of work that I’m pretty confident I don’t want to do myself- cleaning/replacing sliders, recap, new buttons. But these little calibration adjustments made an enormous difference to the tone and it’s so cool to know I can adjust the tone so easily to my liking whenever I want!
Hope this helps some of yall!