How do you switch iTunes to MP3?

To switch iTunes to MP3:

1. Open iTunes.

2. Click on the "Edit" menu and select "Preferences".

3. Click on the "General" tab.

4. In the "Import Settings" section, click on the "Import Using" drop-down menu and select "MP3 Encoder".

5. Click on the "OK" button.

Now all new music files imported into iTunes will be in MP3 format.