A lutemaker friend did the work and I can't distinguish it from the
   original bone on the nut.

   He called it dentine. It seemed to be liquid and in a small bottle.
   Perhaps it's a sort of ceramic used for filling front teeth, but I
   admit I'm not sure. Perhaps a lute maker on the list will know.

   Best

   Anthony
   [1]Sent from Yahoo Mail for iPhone

   Le jeudi, novembre 28, 2019, 10:59 PM, John Mardinly
   <john.mardi...@asu.edu> a écrit :

   I have seen a similar problem when moving to smaller diameter strings,
   especially if the nut was filed with jeweler's files giving it a âv'
   shaped profile . However, what is 'dentist's dentine', some sort of
   magic epoxy?
   A. John Mardinly, Ph.D., P.E.

   On Nov 28, 2019, at 1:32 AM, Anthony Hind
   <[2]agno3ph...@mail.cs.dartmouth.edu> wrote:

     Could it perhaps be  Leonard, that the grooves at your nut at 5C was
     set up for your thicker unisson strings. Something similar happened
   to
     me on my 11C lute, when I replaced Venice twine unissons on F4 with
     equivalent thinner loaded strings. I heard a definite rattle. I put
   the
     Venices back and the problem went away.
     However later on my 3A unisson HT gut strings a  similar rattle
     appeared, I hadn't changed the diameter, but perhaps some wear had
     slightly widened the groove or the neck moved a little. I could have
     changed to slightly thicker strings, but a lute maker friend said he
     could lightly fill and raise the nut's groove with dentist's dentine.
     This did the trick, so this solution for changing to octaves could
     possibly work for you.
     On my 7C lute, on 5C, I have Venice twine unissons and like yourself,
   I
     have been thinking of moving to 1.00 Venice bass and 0.52HT octave,
   but
     I fear a similar problem will occur as the lute originally was set up
     for the unisons so with a wider 1.00mm groove
     Also, I imagine perhaps wrongly, that a 0,52 Ht gut string will last
   a
     lot less than a 1.00 Venice unisson.
     Am I wrong about that?
     Best wishes
     Anthony
     [1]Sent from Yahoo Mail for iPhone
     Le mercredi, novembre 27, 2019, 8:33 PM, Leonard Williams
     <[3]arc...@mail.cs.dartmouth.edu> a à ©crit :
           I, too have had issues with octaves on the 5th course of my 8
       course lute.  I tried it several years ago, using an octave half
   the
       diameter of the bass (all in gut).  But, whereas the octave g on
   6th
       blended well with its bass, the octave c stood out, sounding
   jangly,
       almost as though I had a metal string on there.  Perhaps it was
   poor
       (thumb-in in this case) technique?  At any rate, I switched back to
       unison.
           I'm trying octaves again as a result of this discussion, same
       stringing.  One thing I paid careful attention to was the height of
     the
       octave: it stood a mere half millimeter above the bass at the
   bridge,
       but enough that I was striking the pair of strings unevenly, with
   the
       octave ringing out quite plainly.  I adjusted the bridge knot, what
       little I could, and the sound improved somewhat.  Perhaps further
     work
       with RH technique will further improve the sound.  Or--any other
       suggestions??
       Regards to all, and Happy (US) Thanksgiving!
       Leonard Williams
       On 23 nov. 2019, at 13:17, Jurgen Frenz
       <[1][2][4]eye-and-ear-cont...@protonmail.com> wrote:

     Hello there,

     I have an 8c lute now since 10 months and from the beginning I'm

     "unhappy" with the sound of the unison C strings on it. I changed

       the

     plain Aquila strings to round-wound Aquilas but to me it sounds

       quite

     the same. What I'm missing is the high frequencies that we have on

       6c

     instruments with the octave string. In my mind I call the current

       sound

     "plastic-y". The maker of the instrument suggested to try out the

     Savarez early music strings but I do not think I would recover

     high

     frequencies with them.

     Any remedies that you have tried out with success other than "just

       get

     used to it"? An octave string shouldn't be a good idea because it

       would

     confuse voices.

     Hoping for some suggestions,

     Jurgen

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