It is surprising how fast it went. About 5 hours total after gluing it up. It is about double the weight at 880 grams. (I used the kitchen scale) and the tap tones are viola like at 360/180hrz. I don't know if th etones will drop in half when the weights drop in halve; but it does seem to me that at least the wood is in the ballpark.
Here it is this morning before cutting it out with a coping saw. It is much easier to saw spruce than maple. But, I bet you knew that.
I can refine it some before I have to build the ribs so I can finalize the outline.
First off, I will have to be sure that the bottom is still flat. It doesn't seem to have moved.
Then I will cut the eges down to about 6 mm. That should be plenty.
On the inside I can take the long arch out to the blocks, or close to them, and re-do the cross arches to match.
Then I can carve the ceter area of the front down to a smooth circle, and even out the thicknesses.
Then I can blend the cross arches into the edges. They will still be high.
That is about it. If I do the same with the back, I can arrainge things like arch height (I have some room on the belly, but not the back) and thickening, to get the plates to be close in pitch. I don't really know if it matters, but it is easy enough to do. THat is about all that can be done until it gets down to finishing.
Do you use those Chladni patterns when finding the sound of the plates?
ReplyDeleteNo, I don't have any interest in that. I just tap them, and listen to the sound. Some can have a half a dozen different notes just moving where you hold them, and tap them. I don't mean a fundamental, and a fifth, and an octave. I mean C, C#, Eb, F... Lots of different notes close together. Usually they start out as a fundamental and octave, and maybe a fifth though.
ReplyDeleteyeah, I notice that too with all the notes one can get just with-in an inch or so finger/thumb movement on the plate. What would those Chladni patterns be used for that could help plate tuning?
ReplyDeleteI don't know what they would be used for. If it is just to make a pattern, and make a triad ring strongly from a plate I can't see that it has anything of service to a violin maker. Maybe for a scientist, but not a maker.
ReplyDeleteOne way that could work for a maker would be to try the tests on a well known, good sounding violin. But these days, who would disassemble one and do that to a high dollar instrument? Maybe they didn't have the answers after testing back then or someone figured something and kept it a secret or someone just flat out misunderstood when told about the tests.
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