I have been working on a HTML5 project and I recently noticed Opera 10.60 supports audio tag perfectly but not latest version of Opera (version 11.00 build 1156). you may try with URL: http://moztw.org/demo/audioplayer/ with Opera 11.00. I can see the audio player without problem but it just doesn't play the music. My HTML code is as simple as :- <audio controls src="media/vincent.ogg" type="audio/ogg"></audio>