Setting Songs to Play at the Same Volume Level
iTunes can automatically adjust the volume of songs, so they play at the same relative
volume level. You can set iPod classic to use the iTunes volume settings.
To set iTunes to play songs at the same sound level:
In iTunes, choose iTunes > Preferences if you’re using a Mac, or choose
Edit > Preferences if you’re using a Windows PC.
Click Playback and select Sound Check, and then click OK.
To set iPod classic to use the iTunes volume settings:
Choose Settings and set Sound Check to On.
If you haven’t activated Sound Check in iTunes, setting it on iPod classic has no effect.