Why does the Loudness between songs vary so much?
There's a good chance that all the audio files you have on your computer or external storage device right now didn't come from exactly the same place. Over time you've probably accumulated your library from various places such as:
- Purchased and downloaded songs from various online music services
- Ripped songs from audio CDs.
- Downloaded from legal file sharing sites.
- Recorded live performances.
- Digitized from analog sources like vinyl and cassette tape.
Volume Leveling in Windows Media Player
To minimize loudness differences between all the songs in your music collection, Windows Media Player 12 has a volume leveling option. This is another term for normalization and is very similar to the Sound Check feature in iTunes. Rather than directly (and permanently) changing the audio data in your song files, the volume leveling feature on WMP 12 measures the differences between each song and computes a volume level. This is a non-destructive process that ensures that each song you play is normalized in relation to all the others. This information is stored in each song's metadata -- very much like how ReplayGain does. In order to use volume leveling in WMP 12, audio files have to be in the WMA or MP3 audio format.
Setting up WMP 12 to Normalize Your Music Library
If you are experiencing volume differences between the songs in your Windows Media library and want a quick and simple way of eliminating this annoyance, launch the WMP 12 application now and follow this short tutorial.
- Switching to the Now Playing View Mode
- At the top of WMP's screen, click the View menu tab and then choose the Now Playing option. If you don't see the main menu tab displayed at the top of WMP's screen, you can easily turn it on by holding down the [CTRL] key down and pressing [M]. To achieve the same thing via the keyboard, hold down the [CTRL] key and press .
- Enabling Automatic Volume Leveling
- Right-click anywhere on the Now Playing screen and choose Enhancements > Crossfading and Auto Volume Leveling. You should now see this advanced option menu pop up above the Now Playing screen.
- Click the Turn on Auto Volume Leveling link.
- Close the settings screen by clicking the X in the top right-hand corner of the window.
**Note** For the songs in your library which don't already have a volume leveling value stored in their metadata, you will need to play them all the way through. WMP 12 will only add a normalization value when it has analyzed the file during a full playback. This is a slow process compared to the Sound Check feature in iTunes for example which automatically scans all files in one go. If you already had a large library before turning on volume leveling, then read the time-saving tip in the next section.
Automatic Volume Leveling When Adding New Files to Your WMP Library
To ensure new files added to your WMP 12 library in the future have volume leveling automatically applied, you'll need to configure the program for this too.
**Tip** If you already had a large Windows Media library before turning on volume leveling, then instead of playing all songs from start to finish, you may want to consider deleting the contents of your WMP library and then rebuilding it to save a lot of time. Importing all your music files back into an empty WMP library (since turning on volume leveling for new files) will ensure normalization values are automatically applied.
To enable this option:
- Click Tools in the main menu tab at the top of the screen and choose Options... in the list.
- Click the Library tab and then turn on the Add Volume Leveling Information Values for New Files option by enabling it using the check box.
- Click Apply > OK to save.