This project is exclusively focused on the overtone series numbers 8 – 12 (click here if you need a refresher on OTS numbers).
The basis of control of the horn is establishing control of the overtone series. Our goal is to be able move up, down, or up and down any length of adjacent overtones at any speed (from very slow to very fast), first slurred, later tongued. Repeat through all horns (i.e. all fingering combinations on both sides of the horn). After we acquire some control of movement between adjacent overtones, we add the skill of leaping cleanly between nonadjacent tones, such as between OTS 6 and 8 (e.g G4 to C5).
One way to work on overtone mastery is to focus on different regions, say: OTS 2 to 5, 4 to 8, 8 to 10 and 8 to 12, and 12 to 16.