If you open iTunes - library & select the track you want to convert Right Click & you will be given an option to convert to MP3.
It seems to create another copy of the track in MP3 format rather than overwriting the original.
Samsung Galaxy Book 2: Release date, price and specs
This First Man soundtrack vinyl cover art is exquisitely composed
How to watch Apple’s October 2018 iPad launch
Meilleurs VPN (2018)