These are "intermediate" masterclass topics.
Bass -- Shifting and Tuning- Masterclass -- Hunter
Violin -- Fingerboard Geography Intonation -- Karli
Horn -- Playing Position & Right Hand Placement -- Courtney
Trumpet -- Tone Masterclass -- Emily
Oboe -- Reed Masterclass -- Shelby
Clarinet -- breath, embouchure, articulation -- Sami
Trombone -- Tone Masterclass -- Elijah