uTool is a software that works for both LP-16 and uTrack. First things to do with the uTool for your device is to change the target device. In uTool go to “Settings” tab and choose the Target Device as LP-16.
Once you have done that you can follow the user manual to create multi-track songs and playlists. The manual also tells in detail on how to export songs to a USB drive.
For example, new multitrack songs can be created in the Export tab of the tool. (Export -> Multitack Songs -> Add new song).
If you still have problem with creating songs for LP-16, please send your details (phone, skype) to email@example.com and we will contact you.