What would one do if they had a collection of .wav files ripped from various CDs, and those tracks were of greatly different overall volumes, and one wanted to achieve a coherent volume balance for the whole set of them - to make a mix tape (CD) for example? I've resorted to manually increasing/decreasing amplitude track-by-track before, resorting to my own audio memory to achieve a smooth volume balance - an okay, but time-consuming approach. There must be some automated way to do this?