Okay, let's wrap this up. You've danced all around the right answer, almost from the first. You pointed out that something was dancing on the strings, you just didn't figure out what or which place on the strings. I pulled the action to work on it, and the noise began as the action moved forward. So of course I had taken off the nameboard and keyslip and keyblocks first. As usual, I laid the keyblocks on the plate behind the treble strings. The plate there isn't flat, near the round holes, so one keyblock had a sharp corner leaning down onto an aliquot back duplex in octave 6, resting on it, but not heavily. (Very close to Ed Foote's bridge pins.) The piano is one of those which shakes around when you jar it, where when you pull up a note standing in front of the high treble, you wonder how good the leg attachments are. So it didn't take much to get it moving, and that bounced the corner of the keyblock up and down on the back segment of the wire -- which just HAPPENED to be exactly on pitch with Eb7. The rhythm of the bounces sped up and got softer as the corner bounced down to a rest position again (like a ping pong ball does). Chris Purdy spotted that I was jiggling the piano very early in the puzzle, and Greg Newell had a case part dancing on the strings. So, you had all the ingredients of the answer. Well done, all. After the second occurrence, from bumping the corner, I wrinkled my brow a little, checked Eb7 one more time, then started bumping the corner of the case -- heard it happen several times, figured it out, plucked the back length where the keyblock corner had rested -- bingo, Eb7 ... Thanks for taking part. Susan
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