The music transcends your nagging self-awareness. Everything learned in practice has to be under your fingers, COLD. Practicing with others develops the other realm of playing. In playing you make mistakes, but still know where you are in real time to pick up from where you erred. You go on and allow yourself mistakes. You make note of them and go back later to correct them in solitary practice. It’s a cyclical process. You begin to learn how to hear.