Working concept syncing different audio sources

[spoRv]

1) i´m afraid i´ve to do more basic research, because i dont´t know how do i determine at which speed i want to/have to play a track - probably some equation. e.g. i decide to play the track i want to add at 100.4%. How do i know that percetage i´ve to add.

WAIT! There is no 100.4%! PAL and NTSC difference is 4% (and not 0.4%) while 23.976 and 24fps is 0.1%.

So, try to change a track to 99.9% (or 100.1%) and see if they get in sync.

Test, test and, what I forgot? TEST! Trial&error method works (for me at least)