Volume leveling for MMA

[Not_tech_savy]

So how does volume leveling work on MMA?
Does it do that degradation thing for non mp3 formats?
Is it per track and does it permanently change the file on my phone?
And if I turn it on through my phone then turn off will my music go back to how it was?

I've messed with it a bit and I don't notice a difference but if it permanently changes the volume. Then unchecking that box wouldn't actually change the sound.
Thanks

[Lowlander]

You can only enable/disable Level volume in MMA. All it does is adjust the Player volume by the Track Volume offset saved in the files tags. Files themselves are not modified and you can disable this if it doesn't give the desired result.