After recording, I press on the "Play" button, but the music doesn't play. Why?

This button will open the default program that associate with .M3U files.

If there is another application such as Winamp that is also associated with .M3U playlist files, the system will use that program instead of Media Player, causing errors or problems with playback. Most of time, you will need to click the Play button again on the User Interface of the 3rd-party application.