
At this stage, go to the Musical Devices option on the Settings. Your keyboard will then show up in Synthesia or other apps.
Now the connection should be established. However, if this doesn’t happen, then you should select the ‘ cogwheel icon’ on the top right side of your device and then open MIDI/USB. At this stage, your keyboard should be detected automatically. Then connect the adapter’s Micro USB end to the Android device. Take the cable that you have connected to the keyboard and to the OTG USB A to Micro USB adapter or OTG USB C to Micro USB adapter depending on your device. You should connect the MIDI end of the cable to the keyboard. If the keyboard has a MIDI port, you will need an OTG adapter or a MIDI to USB cable. You should connect the end of USB B to the keyboard’s “ TO HOST” port. If your keyboard has a USB to HOST port, then you will require a USB TYPE A to USB TYPE B cable. So, unless you can find a couple of class-compliant USB midi interfaces, or if you want to shell out a bunch for something like an iConnect Audio device that can route between devices, I don't think you can get there with that phone. Indeed, it would be nice to be able to send midi over usb between devices, but that isn't possible either without a midi interface on either end. There's just too much latency and lost notes to be worthwhile, even in the best wifi environments.
Midi over WiFi is one option, but honestly, not worth pursuing from my experience. Sorry, you're out of luck as far as BT goes with that phone, so Audiobus session save is no use either.
I can send photos from iphone to ipad.why not midi data? - I'm sure there are a few good reasons! But I'm just a simple musician and I want these things to work like hardware used to, but for a tiny fraction of the price.
But I'm still hoping that a usb cabled option will turn up. That would be great if it worked reliably.
Hey thanks Wim and Cracklepot for the bluetooth ideas.