H\K

Hello. I'm sorry if this is not the proper forum, but I didn't see a BandLab forum, specifically. If possible, can anyone tell me the reason I am getting so much crackle in my song? I've got about 10 tracks, but they are all still in demo status. I rarely play them all simultaneously. Even while I only have 2-3 tracks solo, I still get crackle in the song playback. Any thoughts? thank you H\K