I've got a 220XXX True Tone soprano just nicely overhauled. The thing has always played flat. Previous threads on this site have given the sense that low pitch means A=440 however frequency readings on the horn done accurately in the shop show A=436 as the right tuning position for my horn in order for it to play in tune with itself. So, if I'm to understand this correctly, low pitch is too low for modern ensemble work with piano, etc. and there is nothing I can do--to tweaks, no different mouthpiece, etc. If anyone has any ideas or suggestions, I'd be most appreciative.