This is disappointing. The limitations imposed by this platform are odd, to say the least.
* The official room, used for recording and streaming of the concert. The difference with the other ones is that this was the room with officially Jean-Michel performing live and with the highest levels of visual performances (so that the quality of the 2D video was top-notch). Everything played in sync for all people in the room, and we didn’t care about the framerate or the weight of the world, because it was a world for people that for sure had a very performing PC. In this room there was installed the complex system of cameras for the youtube videos and more “fake crowd” to give the impression of a more filled cathedral in the videos;
* Some VIP rooms. Almost identical to the official room, but with an avatar that was not the real Jean-Michel and slightly inferior visual performances to guarantee a better framerate to the visitors. The experience played in sync for everyone and the midnight moment was in sync with the real midnight;
* The public worlds. Almost identical to the VIP rooms with the only difference that the experience was not in sync with the other users, now with the midnight moment. The performance was recorded and acted as a music box: in whatever moment, you could arrive in the public VRChat world, hit “Start concert” and see the concert performing for you, from the first song to the last song. You could be there with other people in the room, but everyone was seeing their own moment of the concert, depending on when they hit the “Start concert” button. This was the best way to avoid the synchronization problems we had with Alone Together, and it worked perfectly.
Also - in some instances the audio was definitely out of sync with video in the public worlds - the midnight countdown was not synchronized with the Stardust chorus.