On Sun, 04 May 2014 23:25:04 +0200, andrel <byt### [at] gmailcom> wrote:

> On 4-5-2014 21:58, LanuHum wrote:
>> What is C-holes?
>
> Violins, cellos and other members of the violin family have slots cut  
> out in the top plate. These follow more or less the curve of the wall at  
> the height of the bridge. They are more ornamented than simple lines  
> with round holes at the ends and a thickening in the middle. Giving them  
> (at least the left one) more or less the shape of a script 'f'. Hence  
> these are called f-holes.
> https://en.wikipedia.org/wiki/File:Violinconsruction3.JPG
>
> Apparently older violins/violins da gamba sometimes had c shaped holes.  
> Actually you can find one on the wikipedia page of the violin
> https://en.wikipedia.org/wiki/Violin
> Here they are in the middle of the waist, where it makes sense. The  
> image Nekar Xenos referred to was a bit odd in my opinion.
>
> More background: the way sound is generated by a violin is a bit more  
> complicated than you might think and is different for high and low  
> frequencies. Key components are the Bridge, the sound post that connects  
> the top en back plate, more or less under one of the feet of the bridge,  
> and the back plate that is thickest precisely where the sound post  
> stands, and the fact that the bow make the strings vibrate in such a way  
> that the bridge wiggles.
> The back plate has a low resonance frequency and the top plate a higher  
> frequency. For higher frequencies the major contribution comes from the  
> top plate where the left part moves more up and down than the right  
> half. Lower frequencies are carried by the entire back plate. And then  
> we have the resonance chamber.
> In short: a violin is not a symmetric instrument at all. If it would be,  
> it would almost produce no sound at all.
>
> If I remember correctly, the f-holes in the cello leave two pieces of  
> wood on 'peninsulas' that according to a friend of mine (who builds  
> string instruments) are responsible for wolf tones.
>

I wonder how much your friend would charge to build this bass :)

-- 
-Nekar Xenos-

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