The string I use is actually Romanian tennis racket string (black
gut) wrapped with copper. Actually makes a very stable string that I
like very much (and has a nice rich sound), and it wears like iron...
-Arle
I've found Pirastro Aricore cello strings beat gut for stability.
They stay in tune and don't seem prone to going into harmonics.
They are a bit quieter and warmer sounding . I use Cello C for a
low D Gros bourdon which will go up to G but gets a bit loud for my
taste, The Cello G is great at either c or d for the Petit bourdon.
