Posted by js on December 07, 2001 at 08:39:27:
In Reply to: Re: Re: Double Tubas posted by Jon Brady on December 07, 2001 at 06:12:00:
I suspect that you do not understand about what you are inquiring.
So called "double" tubas do not work like "double" french horns with honest-to-goodness "switch" valves.
Rather, double tubas simply have a lengthening valve and some other valves (in line) that play in-tune with the lengthening valve.
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Even a 5-valve CC is a "double" tuba: The 4th valve puts the tuba is "GG" and the 5th valve is a "FIRST" valve for the "GG" tuba.
Six-valve (usually "F") tubas' switch valve (again, the 4th valve) puts these tuba in "CC". The 5th valve is a "FIRST" valve for the "CC" tuba and the sixth valve is a "SECOND" valve for the "CC" tuba...
...The only thing lacking on a six valve instrument is a "THIRD" valve for the "CC" part of the tuba (not needed), which could easily be also added, if desired.
Seven valve tubas (sometimes billed as "double tubas") are attention-getters, but not more playable than six valve instruments.
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I suspected that your terse response reflected a lack of understanding about what you were inquiring. Perhaps you are enlightened.