@SpaceMiNd: What you are hearing is the same thing you hear at the beginning of the AfterGlow dose. A bunch of loud random static noise that I believe is intentional. The static comes as a result of the program trying to play the white/pink noise over the beat when the beat is taking up the full aud...

If you are on Windows, your iDoser library is located in your Documents in a folder called Dose Files. (I.e C:\Users\Dell\Documents\Dose Files) If you rename the folder or delete the contents of this folder you can start fresh with the valid doses.