LP-16 possibilities

You can use the uTool for creating multitrack songs for the LP-16 (and the uTrack24 as well).
This software allow to route 16 (24 with uTrack24) mono track to any output on the device.
This software don’t need to connect your device to the PC. The only thing what you need one USB storage device connect to your PC, and export the songs there, then connect your USB storage device to your LP-16.