<p>I get FLAC files a lot and want to automate the taging of the end point MP3 files after I have converted them.</p>

<p>What is my best library to interface with?  Vista machine and C# for my code base.  </p>

<p>The flac files come with a text file for the show, and the numbers performed.  I'll edit that any way possible.</p>

<p>I use winamp for a player but will try others if free.  :) </p>

<p>TIA. </p>

Check out libid3tag...
http://sourceforge.net/project/showfiles.php?group_id=12349
...
And, actually, the ID3 tag is prettty simple, it's just text (with fixed length fields) tacked on to the front of the MP3 file...
Just make sure you follow the standard, as not all players, etc. do.  For more on that, check out this article on
Wikipedia
link text