Modularity theme: Help with adding audio to blog

I have just set up my photo blog http://liyasphoto.wordpress.com/ and I can’t work out how to add audio files to my blog posts.

Whenever I click the audio file, it does not appear as though the file type is supported. Is this a restriction with the Modularity theme?

Please help!