2013-12-02, 14:14 (This post was last modified: 2013-12-02, 14:35 by sialivi.)
I've only done it the manual way:
1) Download the time synched lyrics (.lrc files most likelly)
2) Open the file in a subtitle editor like Subtitle Edit which support lyrics files
3) Save the file as a .srt file
It's worth noting that the many music videos have slightly different length than the album versions of the songs, like some padding at the start of the song, so you might have to change the timing slightly in Subtitle Edit or use the subtitle offset feature in xbmc.