I'll be sure to look into Subsync - Much appreciate the link! I'm currently looking at NUSAutoLyrixAlign [1], and am integrating support for it in a pre-processing tool [2]. Ideally I'd like to support multiple sync'ing tools!
[1] https://github.com/chitralekha18/AutoLyrixAlign
[2] https://github.com/Gazoo101/lyric-manager