I don't understand the problem - not that I haven't experienced it, I have, but I don't understand the physics of it. The pitch C3 is the 9th harmonic of the open horn, and B4 is the 9th harmonic of the horn with the second valve depressed. Why is it so difficult to play, why is the timbre different?
If I asked a stupid question, please forgive me, I'm really curious.
Dean L. Surkin
Mack Brass MACK-EU1150S, BB1 mouthpiece
Bach 36B trombone; Bach 6.5AL and Faxx 7C mouthpieces (pBone on loan to granddaughter)
Steinway 1902 Model A, restored by AC Pianocraft in 1988; Kawai MP8, Yamaha KX-76
See my avatar: Jazz (the black cockapoo; RIP) and Delilah (the cavapoo) keep me company while practicing