You can compress for many different playback rates. I choose the stereo 20kbps rate which is near-CD quality and plays back continuously from a 28.8K modem if the connection is good.
If you are using speech, the mono 8000 bps version should be fine over a 9600 baud modem.
Since we don't have a RealAudio media server we can't have more complicated metafiles. With the RealAudio server, the metafile can describe multiple formats at different playback rates and the server and player can negotiate for best rate.
AddType audio/x-pn-realaudio ram
<a href="/media/deathero.ram">Death of a Hero (2:40)</a>This setup is used if you want the user to experience the RA player as a separate pop-up window outside the browser. If you want it to run inside the browser you have to use a different mime-type, but I don't recall the exact name. You can also embed the RA player and control it's appearance from within a browser. That's described in the examples at the RealAudio support site at http://service.real.com/.
To display images in the RealAudio viewer you have to make AVI files. I haven't tried to do that yet.
The above information was contributed by:
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