Go to audioboom page and click on the interview you want so it goes to that dedicated page for the interview.  You will see a button that says 'Embed' - click that and a box will appear above it with some code in.  Below the box on the left is a link that says 'options'.  This will bring up a new page with the code and other options on the left.  Click the Dot that says 'If All Else Fails' and you'll notice the code changes to start with the word IFRAME.  This is important and can be used from many other sites, find the EMBED code that says IFRAME.  Then simply copy the entire code, when you reply on here on create a new post you'll see (it's a bit small), in the icons up there ^^^ above the box you type in - a blue link that says HTML.  Simply paste the code in there, either before or after the text you've written in the post.  It will only show up as blank yellow box, that's normal - it will show correctly once you press the UPDATE button and press the button to SUBMIT POST.

Sounds long winded but once you know where to find the IFRAME code from Audioboom, Youtube, Vimeo or wherever & you've done it a few times, you'll get the hang of it.