With Florian’s help, the issue of shifting MIDI port assignments was resolved. For reference, what was happening is that, from one session to the next, the seven Akai APC Mini controllers in my setup would get reassigned to arbitrary MIDI in ports in MT.
Now, having added another two APC Mini controllers (for a total of 15 USB devices), the setup has become unstable again. Depending on how I set up my USB hubs, I can only get 14 of the USB devices to be seen, and I seem to see the same shifting of MIDI ports as I had before… though I can usually get the assignments back to what I want by plugging them in – in a certain order.
What is troubling is that all the devices are always seen by Midiox, but that MT doesn’t see them until I fiddle around quite a bit.
Before I install another piece of software which may cause problems, I’d like to know if the solution to shifting ports referred to in the link below has a chance of working. It’s not clear to me that it would work for anything other than USB drives.
The pieces of software in question are referred to in the third post in this forum.
I’m hoping Florian gets to see this, since his efforts certainly helped before, and he understands my problem in depth.
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Of course I seldom have more than about 6 USB MIDI devices attached at a given time.
When you encounter the problem of the missing device, is it always an APC or can it also be a different device? Or are these 15 APC minis?
And just for the record, the “shifting” of same-name devices can occur with APC controllers because they don’t have a USB serial number. So MT resorts to the topology as reported by the OS — but that can change when rebooting, depending on the order the OS detects the USB hubs and the USB devices.