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Discussion Starter · #1 ·
Here’s the deal. D1 on my TWO1 is about 25 cents flat on the tuner. The overtone (D2 played w/o the octave key) is in tune. D2 fingered with the octave is in tune. When I add the C# key to D1 the tone goes to crap, but it is in tune. I suspect that I need to open the C key to vent it better by adjusting the felt bumper. Any other opinions or advice for DIY on this? Thanks!
 

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What if you loosen up your embouchure and play D1 in tune by pushing in your mouthpiece? The rest might just fall in line.
This is what I find. I push in pretty far (on alto, all the way in), and then relax into tune. It's at least worth a try.
 

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It should have been setup properly to match the tuning when you received it. But if not, you can dial it in by adjusting the low C key height like people have mentioned. Doesn’t sound like there is a tuning issue, more of a minor setup issue.
 

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Discussion Starter · #11 ·
It should have been setup properly to match the tuning when you received it. But if not, you can dial it in by adjusting the low C key height like people have mentioned. Doesn't sound like there is a tuning issue, more of a minor setup issue.
Indeed. I adjusted the C key by backing out the felt bumper and it helped. I think I may need to adjust the size of the felt itself, as it is fairly large (long), which will allow adequate adjustment.
 

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Usually you need to adjust the height so that low D is in tune (or flat if you like to use low C# to raise the pitch)
So you can decide how sharp middle D will get, like a balancing act.
 
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