Hi !!! As I understand it, the reason for the rejection is an unbalanced sound. There is no frequency balance (there are many high frequencies, few medium and low frequencies). There is no stereo balance (mid-side) - there are a lot of sides. In this video Hip Hop Rhapsody_EDIT , I have shown these errors and their approximate correction. Unfortunately, I am not a native English and therefore I cannot comment on my actions in this video. Good luck!!!
Bobfox Thank You! This was a lot of effort. I am very appreciative!