In piano performance you often can hear the mechanical sound of the keys themselves as well as the breathing and humming noises from the pianist. Not to mention

In piano performance you often can hear the mechanical sound of the keys themselves as well as the breathing and humming noises from the pianist. Not to mention a performance will be played in an environment where environmental sounds will be correlated with the perception of timber and the pianists physical movements. I don’t see mention if they controlled for all these things.