MP3/WAV. from old skool vinyl most probable and (digital re releases possibly) songs pre 1995 ??????
then you will see the need for this suggestion Plus one anybody of the above users, then again most old skool ravers or soul music lovers would not utilise the sync, never mind want too do modern beat mixing with skills etc.
so maybe that's my suggestion downfall shame really ??????? but stupidly a shame ???????????????????