QUOTE(Kurt Braun @ Apr 24 2004, 04:00 AM)
The size of the reeds count for as much as the number of keys. I used to have a 55 key triumph. Now I have a 59 key. The extra four keys weigh a ton (slight exageration). But that is because the left side of the concertina is so very much deeper (lower), not because it has four more studs. The lower notes make for a much bigger instrument.
No. That's only part of it.
My 55-button Edeophone and 55-button New Model have exactly the same range in each hand, but the Edeo is significantly larger and heavier. Well, larger will account for some of the heavier -- more wood, etc. -- even if it only makes the chambers larger, to give a different tone quality. But I believe each of the reeds in the Edeophone is also longer for the same pitch. (Unlike with flutes, the length/pitch relationship is not fixed.)
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So if you are comparing a 48 key with a 55 key and the difference is in the upper register where reeds are small (and light) and the tina doesn't have to be made larger to accomodate them, you aren't gaining that much by reducing the number of keys.
As above, it's the "have to" that raises warning flags for me. Certainly, there's less "have to" with smaller reeds, but much of the variation in size and weight among instruments is independent of the "have to" constraints. As I noted, the 55-button Edeophone weighs 20% more than the 55-button New Model, though they have exactly the same range in each hand. Meanwhile, my 59-button Crane-system Jeffries weighs "a ton" -- actually 2.13 kg = 4 lb 11 oz, which is 33% more than the 55-button Edeophone, -- though it has only 4 additional notes (3 in left hand, 1 in right) and is only 7" across the hexagonal flats (and thus 6% less area than the Edeophone, which is 7½" across 12-sided flats). But it also has metal ends, and I believe that Jeffries has a reputation for more "solid" construction overall.
If weight matters to you when looking for an instrument, then ask
first about weight, and only secondarily about number of buttons once you've established an acceptable weight range. I recommend also being sure of a light, responsive action. Sluggish buttons or reeds can make even a light instrument
seem heavy.
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Some day I'd like to have what I'd consider a little 55 key instrument, but it would never replace my larger instrument.
Kurt, why not keep your eye out for a smaller, lighter Crane with the range of your 59-button or more? I'm pretty sure they exist. Maybe even with metal ends.