The import function can be used for import recording from your USB storage device to your PC (uTool library)
Transfer Stereo, Multitrack songs and playlist from your PC to the USB storage device you need to use the Export function.
The uTrack24 does not support stereo file with midi file, but there’s a workaround for this situation.
You can can split the stereo file to two mono wav files with any audio editor (eg: Audacity)
Open the uTool, go to the export tab, click on the Multitrack song / add new song.
Browse the folder where this two mono wav file located, assign this two track to any of the uTrack24 outputs, then select and add the midi file to the song, save the song.
Now you can export the song to your USB storage device.
If you are using the uTool v1 the workaround above working with the LP-16 as well.
But if you are using the uTool v2, this version split the stereo file (or multichannel files) to mono tracks automatically, so you don’t need to split them with Audacity.
The only limitation on the device side (uTrack24 and LP-16) they not support midi playback in stereo mode so you need to use the multitrack mode even if the song “stereo” (two mono channels song)