Honestly it depends on a lot. When you know clarinet/sax its easier to learn the other, because the mouthpieces are similar and the keys/fingerings work very similarly, even if they're in different keys and the notes are shifted four or five spots. (a C on a clarinet - fingering wise - is a G on a sax, if I remember the sax fingerings correctly) But the ambiture (sp?) needed for a woodwind is very different than that needed for a brass instrument. Although trumpet/tuba, I think are similar in the way they're played and the fingerings - I think... So I'm not sure that there is one instrument that will help someone to learn others.... Its more about learning about music in general - how to read it, transpose it, understanding the different terms, and so on. Understanding that carries over into anything you play, but you'll have to learn how to play each instrument on its own; the fingerings/slides/etc....
at 2:16 PM on Sep. 5, 2010