I tuned this piano again a few days later for a master class. The lid had been restored and the percussion equipment was all gone by that time. I could not find that elusive buzz anymore. Either something in the hinges (hinge-pins?) was sympathetically vibrating, or more likely the snares right up close to the rim were doing it. Funny thing is, I could of sworn it was coming from inside the piano. Chalk another one up to "experience" Andrew Anderson At 07:36 PM 9/30/2007, you wrote: >All strings of the unison excited the same short buzz about an >octave +. Had me chasing around a while for something but I >couldn't isolate a sympathetic resonance. I didn't think of lifting >because all three were making the sound. I could try it. I did >lift and level these strings last year. The piano is on full >climate-control with a cover most of the time and there has been >very little variation in pitch. I noticed it today with the lid >off. It was right next to the snares but the sound sure seemed to >come from within the piano. I'll have to check again when the >orchestra instruments are distributed back to their classrooms/owners. > >Andrew Anderson > >At 03:36 PM 9/30/2007, you wrote: > >>>Tuned a D this afternoon to prep for this afternoon's >>>concert. A#6 had a short buzz a harmonic above the note. I could >>>not find an offending duplex (front/back) to mute. Would this be >>>a longitudinal mode? Got any ideas to chase this one down? >>>Andrew Anderson >> >>Hi Andrew, >>I'd think not. The longitudinal would be way up there in pitch, and >>I'm not sure they're even audible that high in the scale. Did you >>isolate unison strings to see if only one made the noise? I'd try >>repositioning the strings a tad, and lifting and leveling that unison. >>Ron N >
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