The Steinway Duplex scale, designed for its sympathetic resonance, can occasionally be too resonant – so that on this instrument (Steinway model O), I needed to weave in baize to the lowest of the (duplex) strings, because all the ‘C’ note dampers sounded like they weren’t working.
The local tuner and the recording engineers were baffled – and thought I was a genius to solve the problem!
‘Elementary’, I said….