The Files tab includes options for uploading various sound files for use by the 
 streaming server. These include:
Introduction file
 Specifies the introduction media file for the stream. The introduction file 
 is an MP3 file that is played immediately after each listener connects, before 
 tuning in to the live stream. This may be useful for for station identification  
 or advertisement purposes.
Fallback file
 Specifies the fallback media file for the stream. The fallback file is an MP3 file
 that is played in a loop if the source stream disconnects. Without a fallback 
 file, listeners will either hear silence, or be disconnected entirely if the source 
 stream disconnects.
