sync up

verb2

1. •
   (informal) To synchronize.

   • Many people believe in menstrual synchrony, the idea that women's menstrual periods sometimes sync up when they work closely together, but the scientific methodology for confirming its existence remains weaker than many assume.
   • They asked us to sync up our proposed conference dates and submit our answer by next Tuesday.
2. •
   (informal) To synchronize (footage) so that the audio and video components play together in correct alignment.

   • You could tell that the video and the audio hadn't been synced up properly, so watching the movie was kind of annoying.