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C3 keyboard don't respond


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Hi & sorry for my bad english ;)

Well, I'm soundengeneer but beginer in LPX... and definitly lost !!

Everything was OK before i tried to learn some shortcuts on LPX (to easyer transpose a midi track, directly from my keyboard Yamaha P90)

--> LPX/shortcuts/modify

I found "transpose event +1" and use the learn button to affect it a midi event from my keyboard. I understood that the "transpose event +1" wasn't the right function for that I wan't (just transpose a midi track, like the transpose menu in the "midi thru" section of LPX) , but whatever, now, when i play keyboard, C3 is missing.     /!\ only when the C3 velocity's below 80 /!\

If I play C3 with a velocity up = it works, below = no sound (& no midi event if i record the track).

I redo the same action with C5, just to see, and C5 disappears too. But when i delete my assignation, C5 come back immediately. C3 don't...

I tried - in "option" -  to initialize all shortcuts --> C3 (velocity at 0-80) don't come back

I tried to re-install LPX --> the same troubleshooting, but my personal-settings less ! :(

I tried a sampler (mode stand-alone) with LPX closed --> C3 works great at 0-127 velocity 

What's wrong with me ??

Is there a com.apple.logic.C3.cs i can change to fix this problem ??

It may seem weird, but I miss my C3... :D

Thank U if U've any idee, have a good day


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Hi Nico and welcome to Logic Pro Help.


We need to know more about your system.

Click this link to your signature and add your system information:

• Logic version and sub-version (e.g. Logic Pro X 10.3.2)

• OS X version and sub-version (e.g. OS X Sierra 10.12.6)

• Computer (e.g. MacBook Pro, Mac Pro, iMac)

• Processor (e.g. 2.2 GHz Intel i7)

• Memory (e.g. 8GB)

• Audio interface manufacturer and model (e.g. RME Babyface Pro)


(most of that information can be found by choosing Logic Pro X > About Logic Pro X, and  > About This Mac)


It may seem weird, but I miss my C3...


Open the Controller Assignments window and press your C3 at a slow velocity.

You should now see the erroneous message that is being hijacked.

Select it in the 3rd column and press the delete key.

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Yes Eric it was here...

I found it miracoulosly at the same Time you wrote the answer....the Third column's hussy ;)

Thank U a lot, i fill soon my computers config (perhaps some questions more about miditracks transpose assignments :) )

Thx again 

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