To add to this, before playing musicians usually set themselves up which will also include counting themselves in. I'm sure if you're very experienced with pla

To add to this, before playing musicians usually set themselves up which will also include counting themselves in. I'm sure if you're very experienced with playing with orchestra or chamber (as Uchida and my friend are) then there is a non verbal language they dial into, call it telepathy if you will, that lets them sense that count in. Sounds fictional but dancers and fighters will also attest to being able to read the thoughts of their partners... So the first note may also include 1-2 bars of silent counting