Ivo Magherini, who provided me with the drawing and photos for this lute, was also able to get a glimpse of the interior.
|Ivo Magherini photo|
The first bar is 32mm in front of the bridge (measurements are taken from the middle of each bar). The second bar is 76mm from the first. The third bar is 59mm from the second. The fourth bar is 50mm from the third. This bar is the center of the rose. There is one bar that runs from the curved edge of the belly to under the treble tip of the bridge. There was no trace of a J bar (bass bar) It was not possible to determine what the arrangement of bars was like in the area above the rose. For reference, the front of the bridge is 101mm from the rear of the belly.
I think of the three bars between the bridge and the rose as primary bars. Their placement and size control the strength and evenness of the tone. At 32 mm from the bridge the position of the first bar provides strength. The location of the second bar, unevenly spaced closer to the third than the first deserves comment. Friedemann Hellwig in his important article, On the Construction of the Lute Belly, Galpin Society Journal XXI, 1968, describes the division of the lute belly by 16th and 17th century lute makers into equal parts with the bridge and bars placed proportionally. I followed this method when I first started building but I had problems with overly assertive notes or weak ones. Eventually I attributed this to equal spacing and when I moved the second bar the tone evened out. Jauch placed his second bar more unequally than I would but I decided to follow his example - after all, these guys knew what they were doing. The barring I used to support the triple rose area is not the only solution but one that is found in many lutes. Since my client for this lute plays with light tension strings I decided to use only two bars between top of the rose and the front block rather than three. Also, I always make this area of the soundboard thicker than elsewhere, around 2.0 - 2.1 mm. So I didn't think it needed extra support.
Before gluing the belly on the bowl I was careful to make sure the bar ends fit snuggly against the edge ribs and by stretching a piece of sewing thread from the bridge to the nut I assured myself that the neck was in proper alignment.
Next time I'll describe making the triple nut extension.