Harmonica rocks!!!! Easy to learn... but one of the hardest to really master. Listen to this guy at www.tenhole.com for some great jazz on a diatonic overblow.
While it is not a toy and is (when played well) a beuatiful instrument, it has never been considered part of the orchestra,wind band idiom. the guy with Blues Traveler plays some hellacious harmonica.
it has mainly been considered a blues/ jazz/ rock/ pop kinda instrument.
Im sorry but thats not right. http://www.harpdepot.com/productdetail/~Model/267~/d.html this link shows what is called a orchestral harmonica which is used in guess what?? Lol.. its a big monster of a harmonica. I want one so bad!!