Nope, I even reinstalled the app. Here's the message I'm getting:
Android did not find any devices, but Linux did!
This means that your cable is OK and your device probably supports USB host mode, so you should try rebooting and replugging your device.
Please make sure to connect your USB audio device before starting the app. If it fails to detect your device, chances are that your Android device and/or audio device are incompatible.
Is it entirely possible that my phone doesn't even like USB OTG? I tried the OTG adapter with a memory stick, and it worked fine, or should I get a Mini-B to Micro-B?