How do I convert m4a to mp3 in GarageBand?

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Tags

1. #recording
2. #compression
3. #location
4. #settings
5. #exported
6. #click
7. #share
8. #where
9. #audio
10. #format
11. #edits
12. #export
13. #saves
14. #change
15. #window
16. #bring