Midi stopped working with iOS 15.4

I always play with iPad Garage Band, Usb controllers and audio interface. Today i noticed that iOS doesn’t support MIDI and USB interface anymore. Apple, please, i worked well with you hardwares and softwares, as well as i spent much money to buy correct hardwares. This is a very bad joke…

This is weird. All my devices with 15.4.1 stoped working after update. Now I’m using a din cable and it works back on all devices.

These are the possibilities I tried here.

Cable

USB-B to USB-A with Lighting Camera Adapter or USB-B to Lightning (Agvee)

Devices

iPhone 13, iPhone 8 or iPad Air 2

iOS 15.3.1 work.

After iOS 15.4 don’t work.

Cable

USB-B to USB-A with USB-C Camera Adapter or USB-B to USB-C (Ugreen)

Device

iPad Air 4

iOS 15.3.1 works

After iOS 15.4 doesn't work.

MIDI DIN to USB-A with USB-C Camera Adapter or lightning Camera Adapter

All devices are working. Tried on iPhone 8, 12, iPad Air 2, 3 and 4. All with 15.4.1.

I'm using a DOREMiDi Brand cable. This is the only way I found to use SimplyPiano for while, at least, until Apple fix this problem.

Same problem. All midi apps when Steinberg UR 44C connects to USB C fails. This is garbage, and it is the update. Never a problem in the past and I’m sorry, I’m not going to replace my entire rig, which is exceptional, to accommodate a clear error of omission.

i updated my iPad Pro to ipadOS 15.5, plugged in my Yamaha MO8 keyboard and opened AUM app…it worked! usb MIDI worked again... but only for a few minutes. Suddenly a message appeared on the screen to set up face ID. I canceled the setup and when I went back to AUM my Yamaha was gone again :(

I’m specifically having usb midi problems with iOS 15.4.1, Yamaha S90, Ensoniq TS 10, and Akai MPK 249. There’s a 20 plus year difference on some of these boards but it wasn’t a problem before the update. I use IPad Pro and Strindberg UR 44 C

I have just spoken to an Apple rep who was trying to help me. Apparently iOS 15.5 is now out and they have fixed a kernel error that was causing a problem. The power just went out at our place so I can’t force the update at the moment, but I’ve heard from others that it resolved their issue so I am going to install the update and see if it resolves the with my iPad Pro not recognizing my midi device.

I too, hopefully installed the latest update. No difference. In fact, no midi applications will even start on my iPad—whether I have midi connected or not. They all just crash while trying to load. This is crazy.

I think if Apple wanted to provide good support to their users, they should read this thread and write a message here telling us that they are already working on the bug. That would be very good for all of us.

Same problem here.

I can no longer use SimplyPiano with my iPad Air 4.

If I start SimplyPiano with the keyboard connected the app crashes at startup, if I connect the keyboard after SimplyPiano is started, the keyboard is not presented to the app.

I tested another MIDI app which is moog, but it can not see any MIDI keyboard.

Anyone knows if this behavior is occurring with some versions of MIDI? Or, is this occurring with all MIDI devices?

I contacted Apple tech support which recommended reinstalling iPadOS from the macbook, I did it, but the problem persists. It is clear now the problem is in the operating system, because I have and old iPad that does not have the latest iPadOS and MIDI apps works fine with the same keyboard.

I also use a M-audio audio interface that works fine with the new iPad, so the problem is not related to USB, this problem seems to affect just MIDI.

@norbert111 So, you’re suggesting the following set up as a workaround: a 5 pin DIN MIDI cable connected from the keyboard to a USB audio interface and that connects to a Lightning to USB 3 cable to the iPad? You mentioned using iRig Audio interface. Do you think any audio interface would work the same?