I think the problem lies within your original music file such as sound interference or anything that shows it was poorly produced. However, if you'd like to try another software program, TechRadar is giving away free copies of Ashampoo Music Studio. I haven't tried it myself, but maybe it will have what you need. https://www.techradar.com/news/techradars-downloads-advent-calendar-get-ashampoo-music-studio-2018-free