Is a Midi 5 pins connection abble to be used in midi learn?

Hello!
I've pretty understood how to use midi learn for USB inputs, (even If I have some issues with MPK my prefered Nektar LX 25 is very easy to use)
I find very usefull to have multiple controler conected to several plugin or program, not really because I have an instaled studio but much more to do joyfull noise's jams with friends around the MPC.
In order to use as much as controler I can I've tried with old midi controlers midi 5 pins conected. but I don't succed to use midi learn with it...I mean it catch something but type of signal isn't recognised, nor chanel or data, and it remains unusable.
Does it occurs with all MIDI 5 pins conection?

Why wouldn't it? MIDI is MIDI. Are you sure the cable works?

Maybe that particular control doesn't send out MIDI data? Maybe its sending out Sysex or an NRPN instead of a regular CC control? Not sure if you can use Sysex with the controls in there..

My problem is solved, reading your comments I've understood that the problem should comes from devices then I've looked at these with more attention. first device is a Yamaha su10 sampler that was given to me and which pads was previously cleared from notes, I've atributed new notes and it works fine, the other device is a keyboard that need to be switched to cc for button use.
Thank you : )