Thank you for your input.
We already planning to release the uTool v2 where you can use mixed content. So you can include “stereo” two channel song, or multichannel song and mono track as well into multitrack song, and you can have mixed content stereo and multitrack content in one playlist as well. With this version you don’t need to split the stereo songs anymore.
This version already under testing we planning to release in the coming month(s).