Detecting a physical midi controller's input & output

[refusesoftware]

@narrsam

…what if I have 2 keyboards of the same model hooked at the same time? That would create some confusion! Unless the system magically distinguishes them from each other by adding an enumeration or something like that

Have a look here at this thread, where I just added some more info. In short, you can distinguish between 2 devices of the same model with MidiDeviceInfo::identifier , but not in any persistent way:

Is MidiDeviceInfo::identifier unique per unit?

Hopefully a quick question - is the MidiDeviceInfo::identifier unique per individual unit? Or only unique per device model (or perhaps firmware version of the device)? For example, if I have 2 Korg nanoKeys plugged in, will they each have the same identifier, or different ones? If others are interested in figuring this out empirically, I would be happy to post some identifier strings here, and we can compare. I just don’t have 2 of the same model unit here to check this myself. PS: There is s…

But that said, I’d point out that on macOS anyways, you can rename your MIDI devices in the Audio MIDI Setup app, and give different names to different devices of the same model, and that unique naming will be persistent.