bloke wrote:Some pitches will be played with tubing that is the same length. Some pitches will be played with tubing that is profoundly shorter.
bottom line G/4th space G: BBb tuba...?? CC tuba...??
C & B natural below the staff/C and B natural in the staff: BBb tuba...?? CC tuba...??
Primarily the bugle is shorter, and this is quickly sensed by the player - just as it is with an Eb tuba, F tuba, and a euphonium.
You can't compare the gap between Bb and C to the gap between a contrabass and a bass tuba.
There are a few notes where the C tuba plays a lower partial and uses shorter tubing. But an Eb or F tuba is sufficiently far away so that the instrument is almost always playing a lower partial on the instrument and using shorter tubing, at least above the bottom octave.
I've run down the list of notes before--search the archives. For example, a C on the staff is played on the fourth partial on a C tuba--16 feet of tubing--and on the fifth partial plus the first valve on a Bb tuba--20 feet of tubing. But the Bb right below it is played on 18 feet of tubing and the fourth partial on both instruments, with the C using more valve tubing. (An F tuba would play the C on the open third partial and the Bb on the first-valve third partial--12 and 13 feet of tubing.)
The notion that an instrument must be uniformly conical is to me silly. It doesn't line up with the literature, and it's an impossible dream in any case because of the varying lengths of the valve tubing for different notes. But it is true that lip slurs and other acts of nimbleness are easier with more valves in play for those notes where the tubing length is exactly the same. This gives a little advantage in terms of feel to the CC player, I think. Whether the sound holds up depends on the instruments and not on the bugle length, it would seem to me.
Fact is, a great Bb tuba and a great C tuba will each have their better and not-as-good notes. That Holton you are refurbing, like mine, can give most orchestral BAT's a run for their money, right? The advantage to the great Bb tuba is the price you pay for one. Mine was well under two-thirds of what the very same instrument (in the same condition) would have cost as a C with similar playing characteristics. The advantage to the C tuba is that great ones are easier to find as long as you can afford them, owning one might keep you out of trouble with your teachers, and owning one might just be more fun or statisfying to you. All good reasons and appropriate depending on the circumstances.
Rick "who thinks the tubing length issue only applies to pairs of isntruments no more than a step apart" Denney