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Old 01-18-2021, 02:46 PM
Alan Carruth Alan Carruth is offline
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There are lots of anecdotes on this, one way and the other, but I'm not sure there's much actual data. Even 'identical' guitars made from 'the same' wood sound different, simply because it's a natural material and varies. I would hesitate to attribute a change in sound to some particular variable on the basis of a sample of two instruments. And, since all of us tend to hear what we expect to hear you'd have to do 'blind' tests.

I use arched bracing and radius dish throughout, but not for sound. Up here in New England the humidity and temperature changes so fast and so often, and swings so widely, that top and back cracks are the repairman's bread and butter. An arched top is less likely to split than a flat one, so using the radius dish is one way to keep the customers from coming back for the wrong reasons.
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