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Carving & tuning after adding bass bar

Ed Glass

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Violin Top plate


Before ff and bass bar:

weight gm.s       mode 2 Hz     mode 5 Hz

69.5                    170                  337


After ff and partially (?)  carved BBar:

71.2                    182                  339


Have observed that trimming distal thirds of Bbar RAISES

Modes 2 and 5  (probably d/t reduced mass), and 

that carving/trimming middle third LOWERS modes 2 and 5 (probably d/t

reduced central stiffness).


But where/how to carve Bbar to bring Mode 2 down more,

without affecting Mode 5 much ?


And similarly, how best to preferentially affect

mode 5 rather than mode 2 ?



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