You can say you don’t agree with the facts, but the facts are still the facts.

The instruments can’t be “in sync” just by the virtue of being instruments. A violin sitting on a shelf won’t ever be in sync with anything. It needs to be played for it to be in sync. When it’s played, what constitutes “being in sync”? The same time or tempo, if you will.

https://www.merriam-webster.com/dictionary/in sync