When I record sound on my Android smartphone the software saves audio files in the 3gp format. Unfortunately for some reasons the 3gp file settings does not let the Windows Media Player standard codecs play the recorded sound.
I found a very helpful website, which for free converts 3gp formats to mp3 for free.
I would like to recommend the website:
Briefly unavailable for scheduled maintenance. Try again in a minute. This error message I got after upgrading themes in my WordPress. I did not worry too much because I always do backup of my website.
But instead of doing a file and database backup I found what could made a problem.
During upgrading themes WordPress created a temporary file located in the main html folder called .maintenance
Just simply delete the file and it should resolve the error message 🙂