Jeff, As you have seen so far, there are lots of possible sources of this noise. Since we are used to using our ears to diagnose sound, why don't you tape the sound and post in on youtube for us to hear? -John Parham > -------- Original Message -------- > Subject: [pianotech] Sub Harmonic "buzzing" in Treble Intervals > From: Jeff Atkisson <jeffkiss at sonic.net> > Date: Wed, February 16, 2011 12:42 pm > To: pianotech at ptg.org > > > Hi, you all don't really know me - but maybe you have a quick answer > for me. > > It's a Stenway M. > Octave 6 and 7 (mainly) > Play a fourth or a fifth say from E6. > Strange (to me) "buzzing' or humming sound at a lower harmonic (i.e. at > approximately E5 when playing E6-B6). > Piano is in tune. (does it with single strings) > Only does it it with intervals (not single notes). > Lasts for around a second or two ... > Does it with most of the intervals played in this range (not in high > treble or below about C6). > It muddies the sound of chords and intervals there. > > It seems like its the board but I can't seem to stop it by pressing on > ribs - although I haven't done extensive searching in this regard. > > You all know what this is? > > Please don't tell be its my ears or my imagination ... > > pretty sure I could catch it with a mic if I could post the sound clip. > > Thanks > > Jeff
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