Issue with supplied TRS MIDI plugs

Synth
1

No problems sending and receiving midi notes and clock via USB but I was having no luck with the supplied TRS MIDI plugs.
I have found that the Arturia ones that came with my Audiofuse interface work as substitutes.
I decided to use a Multimeter to see if I could identify the issue.
Based on this midi.org post Arturia use TRS type B in the following manner.

Screenshot 2025-01-18 at 12.20.21 pm
Screenshot 2025-01-18 at 12.20.21 pm780×1072 107 KB

Comparing tests with the Multimeter on the Arturia plugs vs the supplied Polyend ones I’ve noticed that, while TIP and RING are connected to pins #4 and #5, EARTH is not connected to #2. Instead it seems to be connected to the metal body of the plug.
Could this be why the supplied plugs are not working?
Before I update my support ticket I’d love to know the opinion of anyone with more electrical engineering experience than I.

2

the polyend ones work fine for me.

3

Thanks for your comment but they definitely don’t work for me.
If you have a multimeter could you possibly test to see what pins are being used on your ones?
With my limited knowledge I would not have thought the earth going to the metal body rather than pin#2 would make a difference but so far it’s the only thing I can tell is different from ones that do work.

4

Tested with a multimeter, middle pin to sleeve. All good here.

6

Thanks for the test. And I presume they are working fine.
Sleeve is not going to the middle pin on the plugs supplied to me.
It does seem that it might be the problem.

7

Yes they do work though i dont use them.