♪ ♪ >> stahl: that's where his background as first violinist, borda says, sets him apart. >> borda: hetes with each section, because they need very specific directions. >> jaap van zweden: please, horns and trumpets. ( sings ) that serves much better the music. third horn. >> borda: this is what makes an orchestra fall in love with him. >> jaap van zweden: that's way too loud, and rushed. >> stahl: but it isn't always love. jaap admits he's demanding. >> jaap van zweden: that is not together. >> stahl: and in dallas, some musicians complained to the newspaper. tactics of fear, over-demanding. you're-- you're too critical. >> jaap van zweden: i still remember that there was somebody who said, "yes, but i am afraid of you." i said, "no, you're not afraid of me. you are afraid of yourself. you did not prepare well, and then blame it on me." but, okay, you know, i-- i understand that we are all humans, and the best thing is to be as warm as possible. >> stahl: but you are warm. i've been with you for three days. >> jaap van zweden: yeah, but you did not play in my orchestra yet. >> stahl: