Though some lower spec PCs will suffer from lag between audio and video after a while, never tried above 24.00 myself (kinda limited to the longest song I have, and effort).
i tried with one about 26 min. not sure. and it only lagged at the begining for like 10 secs
there talking about a different kinda lag, and 10secs us huge, what happens with longs songs, is the farther into the track you are the more out of sync the gameplay is to the music.
