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Because digital media files are typically created using different volume levels, you may notice that some files sound louder than others when you play them. These volume level differences are frequently apparent when you play a mix of tracks that you have copied from different CDs.
Volume leveling, also known as normalization, is the process of automatically increasing or decreasing the average volume of a file to a specified level when it is played back. The goal of volume leveling is to make all files play at roughly the same volume level so you do not have to adjust the volume level manually for each file. In order for the Player to adjust the volume level of files automatically during playback, the Player must first analyze each file and then add a volume leveling value to it.
The Player adds volume leveling values to Windows Media files or MP3 files when you:
Note that the volume leveling feature does not alter the original volume level of files. It only temporarily adjusts their volume levels during playback when the feature is turned on.
Because previous versions of the Player did not add volume leveling values to files, you may have files on your computer that do not contain these values. You can add these values by selecting the Add volume leveling values for all files check box in the Add To Media Library By Searching Computer dialog box.
You can tell if a file contains a volume leveling value by using the Crossfading and Auto Volume Leveling settings in the Enhancements pane. When you play a file and auto volume leveling is turned on, one of two messages appears: "Volume leveling applied to current media" or "Volume leveling not available for current media." The former indicates that the file contains a volume leveling value, while the latter indicates that the file does not contain a volume leveling value.
This section covers:
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