What is the composition of the under-layer of the 'European' strings?
A copper coating (what looks like copper) must have been applied to the
basic string before it was wound with copper.  Pure copper or anywhere
near pure copper will not withstand the strain on a high tension
string, .especially when coiled around the tuning pin.

A reproducing piano does not have to be singled out as against a
regular player or non-player; sound is sound, no matter what the device
is employed to make it resonate, although people are more critical when
hearing a reproducing piano.

Steve Bentley - SB-music "O" rolls
Vancouver, British Columbia, Canada