Foam seems to be a monkey way of getting around the basics that Yamaha's player system needs to have the ability to be calibrated to play at a whisper. NOT a roar. I have had experience with QRS and Piano Disc and both these systems would play softly, even though you could hear the mechanisms which I didn't like. There has to be a way to adjust the strike or velocity of each note so that it plays just loud enough for the string to sound. Anyone?
John