Starting from Jamroom Core 5.1.6 and newer, you can remove the Play Keys from the stream URL. This will skip the Play Key checking, and allow audio and video files to be streamed from any remote site.
To disable play keys, go into the Core -> Global Config and add:
in the "Allowed Domains" config textarea and save.
The key parameter will still show up in the stream URL, but it will be hard coded to 1 and is not checked by the core.