Ghost players

Hello,
this is not a bug report but a question regarding the behavior of the default players.
I had not luck providing a player for the m4a type of files. Mp3 works fine and the wordpress player behaves very nice, but when I mix audio files mp3, m4a I have for the m4a an embedded audio player that comes from nowhere says "creative commons" ? Is this provided by the browser ?
Where can i find configuration information ?
I'd like to have a constant look for all audio files (same player for all), I did try Jplayer but its way too big and modifying the skin and css is a nightmare.
In your code in the function where you cycle through the players I placed the default return call on the first line of the function so that I have a constistent look and feel. But not a very nice thing to do.
So the question is : is there a versatile player (easy to customize) to play most of audio files?
Or provide some code for Wordpress to play all types ? How to do this?
Are you planning to add support for DewPlayer (works on other cms like spip)
Thanks!