It is mandatory to hear 
… 
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I have to say the sound card manufacturer was GREAT. He refunded me for the card that was making noise and the new card arrived this morning … Unfortunately, however, the defect is still there … less, but it is. This is strange because the sound card was mounted from the beginning and it didn’t have this problem… I’m starting to think it’s the GPIO of the display… could it be that they have a common pin that creates this defect? It does this with both the Waveshare 4A display and the Adafruit 3.5…
Always for fun I recorded these chords, always those of Pino Daniele, with Pianoteq piano, Omnisphere double bass and MiniMoog…
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I made a little video where I also mention the Zynthian… thanks Zynthian!
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Found (used) a 49 key controller for my MiniMoog controller. I have now drawn and am printing the supports.
I’m designing the support structure for the 6 switches that will take the place of the 6 potentiometers. I found the 6 “chicken head” knobs and will try to follow DR Riban’s instructions…
Dear Riban, the commutators with the 2 Kohm resistors… Work perfectly!!!
Many many many thanks.
I ask for yet another help from Riban or anyone who knows these switches. I put 5 switches to 6 positions and for these no problem. But on oscillator 3 you need a 7-position switch… so I took a switch that has 12 pins and is adjustable. Unfortunately I don’t understand how to connect the pins as there are 3 pins that divide the 12 into 3 groups of 4. Thanks for any info
Can you push/pull the button ??
Type the name of your rotary switch with “datasheet” in Google and you will find the internal wiring. It’s hard to tell from a picture and without a multimeter.
If it was me, I will test the A1 to A12 with the multimeter and voila
Ps: some rotary switch have and endstop to prevent going after the 7 of you don’t use the full 12 capacity.
That looks like a 3 pole 4 position switch. You want a 1 pole 12 position switch with adjustable end stop. It would have 12 pins around the edge and a single pin in the middle. It is plausible that your 3 pole switch child be used similarly but you need to use a continuity tester to check which pins make. A continuity tester is often a function of a multimeter but can be made from a battery, lamp and wires
Thanks Wapata and Riban
I’ve already done the tester test, before asking for help. In practice from terminal A you switch 1,2,3 and 4… 5,6,7 and 8 from pin B… 9,10,11 and 12 from pin C… the problem is that when you goes to position B 5, A 1 also goes into closed circuit… I have to look for another switch…
I find this:
Meanwhile, I printed (thanks 3D printer) the waveform module that features three 6-position switches.
The 3 pole 4 position switch is probably designed for that configuration and not to have its end-stops removed. If that is the case I would expect that positions 1-4 would give the same results as positions 5-8, i.e. position 1 and position 5 would have A1, B5 & C9 closed. If this is true then you can’t really use this switch as there is no difference between positions 1 & 5. If however there is a different presentation of closed / open circuit when in each position then it may be possible to use the switch for this purpose.
What you really need is the same type of switch but with one pole and twelve positions. These allow the end-stop to be adjusted to create a one pole ‘n’ position switch where ‘n’ is 1-12 which is what you want. You could use such a switch for each of the panel switches.
This datasheet describes one switch type with lots of configurations. The model I would choose is CK1029 or similar.
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Thank you Riban… in the meantime I’ve mounted the five 6-position switches and I’m VERY happy because, in addition to working perfectly, the sign on the knob corresponds to the serigraphs on the front… I was afraid of the differences.
Now waiting for the “chicken head” knobs…
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The “chicken head” knobs have arrived… I’ll change the one on oscillator 3 as soon as the 7-position switch arrives…
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I used the display of a dead pc to have the double display of the MacBook in front of my eyes…
The collars hanging on the wall are those due to the disproportionate growth of my FRIEND Tesla 
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You know what ? I come back to your topic some times and… You’ve done a wonderful device here !
…
And now for the embarrassing question : do the screen help to something?
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Thank you Wapata,
The display only serves to have Arturia’s MiniMoog in front of my eyes … nothing in particular, just a convenience when I use the laptop (white MacBook) with the MixBus DAW. In the recording room I’m used to having the iMac monitor side by side with another monitor and seeing everything without overlapping windows… and then I like to recycle and not throw away useful objects.