Won't upload music – Slo-Square - Slow Motion For Instagram and Vine Review

****update - this was my fault for being dumb. My music was all in the cloud on iTunes Match so that's why it didn't work for me. App is great. User error!! The app works great for putting slomo video on Instagram but no matter what I try it won't add music. It's worked one time out of about 100 attempts. Even deleted and added the app again. If the music error or any support for this was available it would be five stars.
Review by cOdillingus on Slo-Square - Slow Motion For Instagram and Vine.