Anyone here use WebEx?

I don't like it much, but it's what my benevolent employer uses.

My question is this: Can you share audio, other than through your audio device (phone, headset, etc)?

If you share a web browser and launch a video with sound or just an audio file, will it play over the webex session?

We do a lot of large meetings -- a couple dozen to a hundred attendees. We start the webex at least 15 minutes early so everyone can get in. So, until we actually start the presentations, it's just silence. I'm thinking of having some Scarlatti or something playing while we're waiting to start, but I'm not sure how to pipe that into the webex.