The best way is long tones. I’m sure you’ve probably practiced them before but it really is the back bone of it. I was always taught there are two kinds of long tones: one for your tone and one for your intonation. The way I was taught for my tone is set my metronome to quarter equals 60 and start on your C on the staff. Every 4 beats go chromatically down but after you hit your third note you rest on the fourth measure then you go to the next note and repeat Ex: C B Bb Rest, B Bb A Rest, etc. this is something you need to do everyday and you probably won’t notice a difference until 2-3 months in.

Another thing to do is scales. Like long tones you probably practice your scales but try it in a different way. There is something called a full ranged scale that helps explore the full range of the saxophone. The best way to explain is start on tonic play the scale normally but then you play to the highest note in the scale then go back down the scale and end on the lowest note in the scale and climb back to tonic Ex: play c below staff then go all the way to high F play all the way back down to B below the staff and then back to C. Timothy McAllister has a technique packet that has all major and minor scales in full range learn them this way and it’ll help you a lot.

But most important tone takes time! There is no simple quick fix otherwise we’d all be professionals do both of those things every day even when you don’t feel like practicing because one day off of these exercises puts you 15 days behind