When working with digital audio it really doesn't matter what you do with the level of the volume as long as it's nothing too extreme. As long as all the audio information is still present then reversing a simple volume lowering or highering equalisation is perfectly easy.

It's nothing to be afraid of using, just make sure you don't do anything silly like set the equalisation level overly high or overly low. If you stick within the programs guide lines and default parameters you should have no problems whatsoever.

Cheers