In reply to Actor.

I had that problem. This what I did: I caught a cheaper model of a Bluetooth portable speaker on sale (about $30), pre-recorded the reader's parts into a sound file on my laptop (if you don't have a laptop, use another recording device -- the more portable, the better), and in between each of the reader's pre-recorded lines I gave myself enough time to respond on-camera with my auditioning lines. I played the file through the speaker while acting out my lines on-camera, and it worked like a charm. I actually got cast from that audition. Just have the speaker's volume up loud enough so that the viewer can easily hear the pre-recorded parts.