You asked for it, you got it! lrctool v1.0 is now available on the emphatic section of my web site:

http://empeg.webhop.net/

Scroll down to the "download" links. lrctool is now there instead of lrc2sylt.

lrctool is the new name for lrc2sylt, because it now does more than just LRC -> SYLT conversion. Windows only right now, a Linux version is possible in the future, but I'm not guaranteeing anything, since lrc2sylt does most of what we need. No public source code right now because it was written in a couple hours and it's really ugly.

Here's a summary of the usage:

  To embed LRC files into your MP3's:



    lrctool lrc2sylt [LRCfile] [MP3file]

    EXAMPLE:  "lrctool lrc2sylt song.lrc song.mp3"

      [LRCfile] LRC format text file containing timed lyrics

      [MP3file] the MP3 file to embed the lyrics into



  To convert an MP3's Lyrics3 tag into a proper ID3v2 SYLT frame:



    lrctool l32sylt [MP3file] [options]

    EXAMPLE:  "lrctool l32sylt mysong.mp3 13"

      [MP3file] the MP3 file to be operated on

      [options] one of the following values:

                  1     strip the ID3v1 tag

                  3     strip the Lyrics3 tag

                 13     strip both the ID3v1 and Lyrics3 tags

      By default, ID3v1 and Lyrics3 tags will be left in the MP3, but you

      can strip them by setting these options.  It's a very good idea to

      strip the Lyrics3 tag, and if you have an ID3v2 tag, you might as well

      get rid of the ID3v1 tag, too.



  To export SYLT lyrics to LRC text files (for sharing with others)



    lrctool exportlrc [MP3file] [LRCfile]

    EXAMPLE:  "lrctool exportlrc song.mp3 song.lrc"

      [MP3file] the MP3 file to read synced lyrics from (SYLT only)

      [LRCfile] the output file where you want the text lyrics

.
No guarantees or warranties expressed or implied, so please test this out on some expendable MP3s before you go redoing your entire collection. The LRC export feature was just barely tested, so I'd like feedback on that as well.

Enjoy!