Noisy Action

[Newton Hunt]

Try slipping a length of key bushing cloth under the felt and seeing how
that effects the sound.  If it helps the use thinner back rail cloth
with a double width of bushing cloth to bring the level up to what it
was.

One other source of noise is the knuckle.  You can raise the nap to
silence that noise, for one session.

ALso instruct them to move their microphones further away from the sound
source and put up some isolation barriers around the piano when they
need to.

Look at the later thread on milking pianos.

Recording studio work is a constant round of denoising.

Lots of luck.

		Newton