Want to adjust how music and other audio sounds on your iPod touch, iPad or iPhone? That's easily done through the Settings menu.
Here's where you go:
Settings > iPod
Sound Check – This feature adjusts the audio of the songs on your playlist so that one song isn't extremely loud while another is too quiet to hear. Basically, it normalizes the volume of your songs across the the board during playback.
EQ – Adjust the EQ for audio playback. This can be turned off, or set to fit a particular style of music.
Volume Limit – Set the maximum volume allowable on your device.
Lyrics & Podcast Info – Allow for viewing of song lyrics (where compatible) and Podcast info.