You can normalize the volumes levels of the audio tracks added to Express Burn. This means the volume of the tracks will be adjusted so that the loudest part of the song will be at a certain percentage of the maximum possible volume. By default volume levels are not normalized.You can normalize the volumes levels of all tracks added using This Disc menu, Normalize Level, and select a level you want, or through the Normalization pull down list. All tracks will be normalized when they are burnt to disc.