I installed the plugin, created a post and added an mp3 file.
The plugin recognizes the file, knows the length and file size. When I load the post and press play, nothing happens. The player has no file attached and is muted. under the player it displays the title and duration which are correct. Still, no sound.
I tried turning html5 on and off, no change. I verified the file and its good.
I have no idea why this won't work.