I cannot seem to get any posts to work with the "audio" shortcode. I can use them in a "page" just fine. But, when added to the content of a post, the post URL shows a blank page.
I do not see any error messages. So, I checked the source code of the resulting post page, both with and without the audio shortcode. Without it, everything shows up fine with 110 lines of code for the head. After inserting an audio tag, the head is down to about 50 lines of code and only this one line for the body, "<body style></body>".