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well assuming that there is not something seriouly wrong with your horn (leak?) I would reccomend trying a little singing before you play. e.g. Sing an F with tuner and get it nice and in tune, then buzz the note, then try to play it on the horn. If you find you are still having difficulty a mouthpiece change may be in order. I know that when i switch between certain Mpc's they can have a significant affect on the pitch. Just because it is a small Mpc does not necessarily translate to "raising the pitch".

Out of curiosity does your mouthpiece sit very far out on the receiver?

Best of luck!!!!!

Does it happen when you play other tubas?

if not, here is my two cents:

Your tuba is too long.

Cut it.

No more frustration.

I did it. It worked perfect.

It is colder outside. Is your horn cool to the touch when you play it? A cold horn can easily blow 20 cents flat. A cool horn might be 5-10 cents flat. If you can warm the horn up first with a heater of some sorts then the pitch might be more down the middle when you blow the first few notes.

If I try to do long tones on a cold horn, my lips hurt afterwards from bending the pitch up so high.

Anyways, just one more experience to throw into the mix. Good luck cause intonation is the holy grail of tone.

I had to cut down my Yorkbrunner a bit when I first got it. It also played flat. No biggie.

MellowSmokeMan wrote:I had to cut down my Yorkbrunner

BAD YORKBRUNNER! Stupid tuba, how dare you play out of tune!!