see e.g. here:
Hello,
Suggestion for you. Would it be possible to integrate an MP3 player into the app without having to use an external application, please?
Thank you very much for your excellent work.
or here:
Can you please add a player so one can hear the files durring renaming?
Thanks a lot!
or here:
Can anyone suggest a "Lite" MP3 player to use while editting in MP3tag? That is set to the system MP3 default.
Itunes and Winamp are pigs which keep popping up into my face and hog system resources and slow everything down. Nero's player keeps generating Dr. Watsons.
A plug-in player for MP3 tag that makes saving tags more graceful (save tag would temporarily stop the player so that it could be written to ...) would be helpful.
esp. the hint to use foobar2000 may be useful. You can drag&drop files between MP3tag and Foobar2000 either for tagging or for listening - and see them side by side at the same time