I played in a pro orchestra once. We had one practice. The conductor is critical. Sheet music is open to interpretation to an extent - what shade of emotion ar

I played in a pro orchestra once. We had one practice. The conductor is critical. Sheet music is open to interpretation to an extent - what shade of emotion are you trying to convey; how should the different instruments blend together; how loud is fortissimo for this piece; how fast is fast; at what frequency should we tune, etc, etc. The conductor brings this vision about.