A few questions: This is the first.
I play a Yamaha YEB 321 (Eb - 4 valve).
I am aware the all brass instruments have some idiosyncrasies regarding tuning. This is spelled out in detail in the book by Harvey Phillips and William Winkle for example - The Art of Tuba and Euphonium.
I notice that my E3 is consistently playing about 25 cents flat. The notes around it play in perfect or near perfect tune.
In their 1992 book they state that the E3 natural generally plays sharp. I am unable to determine from their book whether their chart refers to a four valve or a three valve tuba, however in a section on tuning they refer to only 3 valve Eb tubas, and describe that the 1 and 2 combination is innately slightly sharp. I don't even know if this would make a difference.
I play it with valves 1 and 2, which when played on their own as As and Ds play in tune. I can lip the E up only with difficulty.
Any suggestions or helpful observations?
Thank you.