Press S to check the sync. If the sync is behind (If the number is over 0), go into Turbo mode (shift + flag) and wait until the sync equals zero. If the sync is ahead, (if the number is under 0 [i.e. negative numbers]), make your computer lag. The sync is fixed (
Song by Marshmello and Anne Marie Huge shout out to @poplopuk_ALT. I'm probably filling up their remix tree at the moment, but, Hey, you're awesome!
