You can use the browser to select new song from the drive and you can insert as a next song in the cue.
This method works in stopped state, playback state, standard playback and playlist mode as well, you can do that by using the browser button on the device front panel or you can even use the uRemote as well.
So with this method you cannot really change the song order, but you can insert any song as your next song from your USB drive.
I’m sorry but that seems to much work.. I want to select different songs in a split second by sending a midi message from Onsong that runs on my iPad.
For example; If I have totally 150 songs (backing tracks), I must be extreme flexible in choosing songs. If we’re playing song nr 7, I wanna jump to song 134, etc etc