The ass part about jacks is that there is apparently 2 standards for midi over jack, with various gear manufacturers split over which one to use. You can make device accept either but it's pretty rare sight.

Connector wise, far superior to DIN midi

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marpstar 5 hours ago | parent [-]

There are actually 4 ways manufacturers do it. Something like the Disaster Area Designs[1] MIDI Box is a necessity once you start dealing with guitar effects pedals.

[1]: https://www.disasterareadesigns.com/shop/p/midi-box-4

	▲	InsidiousWombat 4 hours ago \| parent [-]
		I've had A/B solved by just schottky rectifier and low enough current optocoupler, but damn ,didn't knew there is even more to that mess