How to Display .m4a audio Player Correctly with BluBrry PowerPress for WordPress Written by Steinar Knutsen on September 1, 2012 Mobile Podcaster publishes audio from your iPhone to WordPress as .m4a files. To display these correctly with BluBrry PowerPress you want to check off the option to “Use Flow Player Classic / HTML5 Audio player”. Share this:FacebookTwitterLinkedInGoogleEmail Get Mobile Podcaster . . .