Arnold Jacobs's machines for measuring all types of brass playing functions were fascinating. They could even be hypnotizing and if we weren't careful they could become preoccupying. But Jake was a very wise man; he always pointed out, after a deep analytical session on breathing or numerous other brass playing functions, that the primary aspect of music making was the music itself and that the music should be the motivating force in learning how to play.   To "tell a story," "read a poem," "play a soundtrack," were phrases he frequently used in his teaching.