The Advanced Stream Redirector (ASX) format is a type of XML (http://en.wikipedia.org/wiki/XML) metafile designed to store a list of Windows Media (http://en.wikipedia.org/wiki/Windows_Media) files to play during a multimedia (http://en.wikipedia.org/wiki/Multimedia) presentation (http://en.wikipedia.org/wiki/Presentation).
It is used frequently on streaming video servers where multiple ASF (http://en.wikipedia.org/wiki/Advanced_Systems_Format) files are to be played in succession. Both RTSP (http://en.wikipedia.org/wiki/RTSP) and MMS (http://en.wikipedia.org/wiki/Microsoft_Media_Services) streaming protocols are supported, as well as HTTP (http://en.wikipedia.org/wiki/HTTP).
ASX files have MIME (http://en.wikipedia.org/wiki/MIME) type video/x-ms-asf (as do ASF (http://en.wikipedia.org/wiki/Advanced_Systems_Format) files).
With the introduction of the WMA and WMV container formats, WAX and WVX extensions have also been introduced by Microsoft respectively.
<asx version="3.0">
<title>Example.com Live Stream</title>
<entry>
<title>Example radio</title>
<ref href="http://example.com:8080" />
<author>Example.com</author>
<copyright>©2009 Example.com</copyright>
</entry>
</asx>Open notepad, enter those code listed above with example.com & 8080 changed to your preferences. Save the file as .asx format then upload to your web.
Copy and pasted from Wikipedia, link: http://en.wikipedia.org/wiki/Advanced_Stream_Redirector