The jazz player has quite different ideas on a desirable timbre from the player of classical music. There is a particular mixture of metals- Flutemet -which may well be of interest to him.
I quote the remarks of one of my customers who is a jazz player and took home with him a crown & stopper of this material to try out."Absolutely SUPERB for my purposes. It became more obvious at home with my familiar acoustic."[sic]
DAVID SYMINGTON- FLUTE AND PICCOLO STOPPERS AND CROWNS