Sometimes you just can't trust your ears. I have an almost total hearing loss in my right ear (nerve damage from a surgical procedure), and what I do hear in that ear is a half-step sharp compared to my good ear. Also, I have had problems with the good ear which caused me to hear notes below low concert Bb a full step flat. They were right on according to the tuner, but that's not how I was hearing them. Cause -- inflammation of the auditory nerve, fixed with a course of antibiotics.
David Bjornstad
1923 Conn New Wonder 86I, Bach 6 1/2 AL
2018 Wessex EP100 Dolce, Denis Wick 4ABL
2013 Jinbao JBEP-1111L, Denis Wick 4AM
2015 Jinbao JBBR-1240, Denis Wick clone mouthpiece of unknown designation
Cullman (AL) Community Band (Euph Section Leader)
Brass Band of Huntsville (2nd Bari)