Frame Dropping vs AV-Sync? What exactly is the difference between the Frame Dropping and AV-Sync options?
I understand that they both drop frames in order to make the playback closer to real-time in the 3D view, but how does AV-sync make it more synced to the sound than frame dropping, if they're both just dropping frames to get the correct frame rate? Is there any time when I should use frame dropping instead of AV-Sync, if they both get the correct frame rate?
As far as I can see:


No Sync just tries to play back every single Frame no matter if it causes lags or time shifting problems with the Audio or the actual physical time.
Frame Dropping drops Frames from the ViewPort Animation Playback to match up with the actual Frame Rate being used
AV Sync skips Frames from Video Footage in the VSE so that Audio and Video in the Image Preview Sequencer Mode stays in sync