You will need to create a .ram file that calls your real audio/video file. The .ram file is a text file with an absolute URL. This URL will need to be: http://domain.com/file.rm
Typically you'll create a subdirectory under your wwwroot, and put all your audio files there. For example, domain.com/wwwroot/streaming
Then your .ram file will contain the URL: http://domain.com/streaming/file.rm