Can mp4 players play mp3 files?

Related questions

1. Is mp3 file free?
2. Can you convert WAV to mp3 in Windows Media Player?
3. How do I convert mp4 to mp3 in iTunes?
4. Is mp4 sound quality better than mp3?
5. Are mp3 files free to use?
6. Can mp3 player play mp4?
7. Will mp3 player play mp4?
8. What's the difference between mp2 and mp4?
9. What has better sound quality mp3 or m4a?
10. Can I just upload audio to YouTube?

Tags

1. #usually
2. #understand
3. #files
4. #should
5. #audio
6. #video
7. #player