You can’t upload audio to free WordPress sites by using the “Add Media” button in the blog editor. However, if you paste a link from SoundCloud into your blog post, a media player will magically appear! So all you need to do to add audio to your blog post is create a SoundCloud account (which is free), follow the directions for uploading audio, copy the URL for the individual SoundCloud track, and paste it into your WordPress story. Magic!
Below is an example of my own. It’s a podcast I just launched in which I interview other Pace professors.