my moOde Addons-Collection

[Nutul]

From a pure developer's point of view, I would entirely ignore the music file metadata; and ONLY search for an exact filename match, the extension being ".lrc" or ".lirc".

Not sure if I got You right - are You talking about "Artist" and "Title" when speaking of "music file metadata" ?

Well, I think this data should be more reliable than the name of the musicfile...

Of course the metadata info is expected to be more correct/complete of a filename composed with it.

But I meant: if the lyrics are on an external file, you should look for a file with the same name as the music one, and extension ".lrc", like:
Eagles - Hotel California.flac
Eagles - Hotel California.lrc

which is basically the same as aaa.flac + aaa.lrc, no matter what track of what album of what artist the aaa.flac file is...