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Gate/triggers not triggering some modules
#1
I noticed that my Nerdseq doesn't trigger my doepfer A-140-2 dual ADSR, even though it normally works fine with other 5v gates/triggers. The behaviour is the same regardless how long I make the gates, or if I play live.

I have looked up on Muffwiggler and people confirmed the dual ADSR is a bit "picky" with gates, so it's not the fault of the Nerdseq itself! Upon looking at an oscilloscope, I noticed the gates from the Nerdseq are very, very slightly "soft" at the edges, which I think is causing the issue. The modules which trigger the dual ADSR successfully have a "harder" edge to their gates.

Is this something that can be changed in software, or is it a hardware limitation? It's no big deal if not, I can look into modifying the dual ADSR to make it less picky if needs be.
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#2
(08-07-2019, 06:39 PM)shledge Wrote: I noticed that my Nerdseq doesn't trigger my doepfer A-140-2 dual ADSR, even though it normally works fine with other 5v gates/triggers. The behaviour is the same regardless how long I make the gates, or if I play live.

I have looked up on Muffwiggler and people confirmed the dual ADSR is a bit "picky" with gates, so it's not the fault of the Nerdseq itself! Upon looking at an oscilloscope, I noticed the gates from the Nerdseq are very, very slightly "soft" at the edges, which I think is causing the issue. The modules which trigger the dual ADSR successfully have a "harder" edge to their gates.

Is this something that can be changed in software, or is it a hardware limitation? It's no big deal if not, I can look into modifying the dual ADSR to make it less picky if needs be.

The trigger outputs of the NerdSEQ can't be changed. These are digital, generating 5 Volt/0Volt and the edges are not soft i think. Any ADSR or normal gate input should be able to recognise the raising edge, else the ADSR might be faulty. ( Edge detection points should be somewhere between 2 and 3 volts!!!)
Even if a edge is very slow there should be a detection for a gate.
The NerdSEQ Gate/Trigger outputs are just how they should be.

I saw that they are some settings with the dual adsr, maybe some jumpers are not set correctly? Or else it is maybe not calibrated well.
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#3
The nerseq triggers everything else fine, so it's not the module itself.

I contacted Dieter and apparently the dual ADSR can be made more responsive by changing a couple of capacitors. It's due to the CEM based design apparently. I think I'll look into that instead.
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