http://forums.xna.com/forums/28.aspxBecause silence isn't golden.enCommunityServer 2007.1 (Build: 0.0)http://forums.xna.com/forums/thread/183188.aspxWed, 27 May 2009 18:18:06 GMT4aa5dbf6-357b-46b2-b5b2-1b660a6dc370:183188Shawn Hargreaves0http://forums.xna.com/forums/thread/183188.aspxhttp://forums.xna.com/forums/commentrss.aspx?SectionID=28&PostID=183188The XNA Framework MediaPlayer only provides visualization data while a song is playing. This is not designed for offline preprocessing.<br /> <br /> I don&#39;t know personally of any other libraries that do this, but I&#39;m sure many exist. You will need first a decoder to convert the song data into a PCM waveform (google for &quot;mp3 decoder&quot; will find many options), and then to run a fast fourier transform (FFT) over the PCM data to convert it into frequency bands (again google for &quot;C# FFT&quot; will find some options).<br />http://forums.xna.com/forums/thread/182942.aspxWed, 27 May 2009 00:29:52 GMT4aa5dbf6-357b-46b2-b5b2-1b660a6dc370:182942Nick Blake0http://forums.xna.com/forums/thread/182942.aspxhttp://forums.xna.com/forums/commentrss.aspx?SectionID=28&PostID=182942I am looking to do pre-processing of visualization data on songs that are not currently playing.<br /> It seems with MediaPlayer, you can only access the current sample of visualization data for the currently playing song.<br /> <br /> Are there other libraries that allow for generating a data structure of visualization data vs time of a song that has not been played?<br /> Or is there a description of the math that XNA uses to calculate the data from the song being played?<br /> <br /> Thanks.<br />