Re: Re: Re: Re: Re: Re: Re: Re: Re: HB euph...no takers


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Posted by Actually on November 15, 2003 at 14:20:18:

In Reply to: Re: Re: Re: Re: Re: Re: Re: Re: HB euph...no takers posted by ? on November 15, 2003 at 12:28:37:

Joe's pretty much got it nailed.

Consider that without the 4th valve depressed, your compensating horn's function is pretty much indistinguishable from a standard 3-valve non-compensating euphonium. That is, without the 4th valve depressed, the air path lengths for valves 1-3 on both instruments are identical.

That leaves the question of the 4th valve. Between F below the staff and second-space (BC) C, the following 4th valve combinations are usually used:

F - 4
B - 4-2
C - 4

Well, F and C are part of the F overtone series. So by tuning the 4th branch slide to play in tune as low F, the C falls into line and the B (part of the E overtone series) is slightly sharp compared to a 4 valve compensator because the very small length of compensation has not been added to the 2nd valve branch by the compensating system.

As a matter of fact, where a compensating euph might make a great deal of sense is as a 3-valve instrument. Only the low E below the F will be somewhat sharp--everything else will be (theoretically) very much in tune. I belive that Dr. Fred Young has expounded on this matter in great detail.

Okay, flame away!

C(G)
(I do own a couple of 4-valve compensating euphs)





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