When mixing songs from several albums, you may notice fluctuations in volume. This is what you’re hearing in your burned CDs.
The solution here is audio normalization. This is the process of leveling out the volume in your music files. You can do this from Windows Media Player 11.
Windows Media Player hides the menus you need to use. So, right-click on the window’s title bar. It’s the part at the top that reads Windows Media Player. Then, select Show Classic Menus. Next, click Tools>>Options. Select the Burn tab. Under Audio CDs, check the box labeled “Apply volume leveling across tracks on the CD.” Click Apply.