There was one review I read that said the small LefreQue added to his 2nd valve knuckle (Sterling euphonium) really helped him get the high 'B' natural to speak. That's a tough note on many euphs.
Miraphone 5050 - Warburton BJ/RF mpc YEP-641S(recently sold), DE mpc (102 rim; I-cup; I-9 shank) Symphonic Band of the Palm Beaches: "Always play with a good tone, never louder than lovely, never softer than supported." - author unknown.
Unquestionably you can mute some overtones by simply placing the clamps ( like the ones used for marching tuba leadpipe) on the branches of your tuba. Some of them truly eliminate some unwanted vibes and it's good to experiment with those. I doubt it it makes any difference to your audience. Whatever makes you closer to your horn is great !
bloke wrote:How much does an infestation of fleas or lice (or just one flea or one louse) on the back of an elephant (or even right there on it's trunk) affect the resonance of the elephant's trumpeting?
If they're annoying him, it's trumpeting may be generally louder...
Instead of talking to your plants, if you yelled at them would they still grow, but only to be troubled and insecure?