Rock- & Blues saxophonist is often playing in concert F, G, A, C, D, E. Even concert B is important.
Jr Walter was often in concert Ab so the Bb was important for him. Junior didn't use the altissimo fingerlings so much. He fingered the low Bb, B ..... pressed up. His altissimo were very clean and powerful. A very physical player. Relaxed ???????
Jr Walter was often in concert Ab so the Bb was important for him. Junior didn't use the altissimo fingerlings so much. He fingered the low Bb, B ..... pressed up. His altissimo were very clean and powerful. A very physical player. Relaxed ???????

one has to learn them on sax to survive and get hired.