Hi Peter. Trying out the app. Downloaded some backing tracks from YouTube to an mp3 format. Made some modifications in Cakewalk and saved as mp3 format. Loaded in the app and there is no sound or sound waves showing up. No sound when I play the track through Stage Traxx. Plays fine outside of the app. Love the app and it’s features. Is there a fix? Or are YouTube backing tracks not an appropriate and authoritative format to be used? Many thanks, Paul