Zynthian comes with a short cable to connect the RPi to the screen and zynaptic. This is also available in the store. If you need a longer one I may be able to oblige. I think I saw one in the garage. A 40 core ribbon cable with three IDC DIL connectors - an old IDE cable.
IDE you say… Hold that thought…
Presumably several of these will have to be stress tested to destruction to ascertain their suitability…?
I certainly hope not… I’d prefer not to blow anything up on this occasion
EPIC! I’m so happy!
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Brave man!!! So get it to work!
Modular => CV/Gate input => Zynthian Layer
Could you share your configuration?
Perhaps you would like to contribute by improving the wiki docs about this 
Regards
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And do @wyleu 's homework for him? 
We worked on it together last night, and I am sure we will again. I’m glad I got this far…but it was very late when I actually made it work last night, and there is still lots to do…
I see in and out for analogue but for digital I think there is only input? Any clues how I can configure digital outputs? Also is there a way I can send note pitch to the analogue outs?
Basically, this has opened up a long list of questions about how to use the connections, that I am sure will fill up wiki pages.
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We had a long old session of confirmation.
i2cdetect -y 1 proved the i2c connection to the zynaptik.
We found this was independant of the interrupts. And is a good sanity check.
The config that worked (for me) involved setting the wiring to 23017 extra after setting the environmental variables which allowed me to config them.
MrBrocolli had the dtoa chip which I don’t have but he’s obviously found a way to config round this, it was complaining about missing _ISR variables.
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Guy Hacks up a working 100 preset Reverb, etc. Board to fit Eurorack
This DSP based effect assembly is available on the Chinese surplus outlets, price has gone up since he built his, now costing about $18 delivered.
Reverb Module Reverberation Mixer 100 Kinds Effects Board (Many sellers at Aliexpress)
$11.35 + $5.78 shipping . . . $17.24 Free Shipping
He describes it in the video as:
“100 different dsp effects, ranging from reverb and delay to chorus, flanger, phaser, pitch shift etc.”
(Wire cutters applied to the PCB looks like a failed magic trick moment…)
Resource Links on the Youtube page.
Examining board images, for chip part numbers, it seems to use:
Cirrus Logic CS4220-KSZ DSP
Wavefront AL3201BG Codec
Atmega8A 32 pin Arduino class 8 bit microprocessor
Nice, I will look into that!
In another amazing feat of testing, I managed to get some digital outputs working last night too! This is great!
We await your essay on the journey to enlightenment.
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Don’t I know it … 
@MrBroccoli could we moot again to work out quite where the edge of this process now is?@ wed25/08/2021: 19:00?
We can, at least do input, both analog and digital.
I’m tempted to build a 555 Clock !!
Wait … are you trying to make zynthclub twice a week? Not sure about that… I don’t think I can make next Monday either… (bank holiday, seaside visit booked)
Maybe I can do a ted talk on it all tomorrow evening and show @wyleu what I have working so far?
No problem! I’m away at my father’s 90th this week, but couldn’t possibly impose on Clacton in any way during that time, obviously . . .
a ted talk
That sounds better! and also probably count’s as a 
Discovery’s of morning:
It boots up from power down with all the input still working.
So that’s reassuring that the configs are holding together.
For the zynaptik to work you must have a layer loaded.
So tonight? Are we?
Sadly, I’m driving down to Essex for my father’s 90th birthday so wont be able to be there . . .
That’s not to say your TED talk couldn’t be refined !
It’s a simple process @riban pushes me I push @MrBroccoli . . .
I am investigating ( trying to get running) LV2 as a module to implement the latching mechanism for the switches & LED’s
Perhaps the Zynthian infrastructure could maintain a default implementation for allowing precisely this sort of mucking around?
Only operates on selected MASTER Channel. Allows MIDI note echo’ing as default to implement Light up Pads et al?
This becomes the basis of hardware recognition and acknowledgement.
The DUO PIANO would probably plug in round about here with it’s need for a startup kick.
Define an external piece of hardware as a name tag and a similarly named bit of LV2 Turtle and build.
Just think how much information we could easily access if we built the RDF side of this properly.
I can’t follow this timeline. On Wednesday @wyleu suggested Wednesday. On Thursday @MrBroccoli suggests Thursday. Maybe a little more notice might improve success.
I offered tonight, as I am away all next week.