So you need to set the USB connection in the Android OS to "MIDI", not file transfer. This ensures that virtual ports are created for the MIDI device. You can then connect MobileSheets to these virtual ports under Settings->MIDI Settings->Configure MIDI Connections, and you can connect your PC or Mac to those virtual ports to connect to Reaper or Live.
I do not currently support RTP MIDI because I haven't really found any open source RTP MIDI libraries for Android and/or Windows. It is supported in the iOS version of MobileSheets as Apple supports it with CoreMIDI. I do want to implement my own solution, but this is going to have to wait until I have a big chunk of time I can dedicate to this.
Mike
I do not currently support RTP MIDI because I haven't really found any open source RTP MIDI libraries for Android and/or Windows. It is supported in the iOS version of MobileSheets as Apple supports it with CoreMIDI. I do want to implement my own solution, but this is going to have to wait until I have a big chunk of time I can dedicate to this.
Mike