Originally Posted by
jakewillis
His low notes are sharp, too.
Wonderful accomplishment. For what it's worth, I have a Mack Brass euphonium, using the SM4X mouthpiece, and my low notes tend to be sharp, also. My teacher recommended a slight pull to the first and third valve slides on the compensating side, which really helped my low Ds and B naturals. Perhaps your son can consider doing the same.
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