Are the backing tracks legal? Andrew August 13, 2017 03:16 Updated Follow 100%. We have a team that works hard to navigate the legalities of adding songs to our catalogue. Related articles Why can't I download a songs backing track or WurrlyGram? I identified an incorrect lyric in a song How do I share my Wurrly on social media? How do I delete a Wurrly that I created? How can I customize my backing track? Comments 0 comments Please sign in to leave a comment.