[pianotech] High Pitched Zing in Acrosonic

[Ron Nossaman]

On 2/6/2012 4:47 AM, Wesley Hardman wrote:
> The piano is a Baldwin Acrosonic with a high pitched "zing" in each note
> played from approx C6 through the next 8 or 10 notes.  It sounds metal
> to metal...thin zing each time the notes are played.  An attempt has
> been made to tighten all screws and check anything metal.  It aomost
> sounds like a "dangling" caster, but the piano is on plush carpet.  The
> piano has been moved away from the wall to check for possible vibration
> in nearby picture.  Will try bushing cloth on the upper duplex
> tomorrow.  Also, the high treble action bracket is loose on the keybed
> adjustment screw and will be tightened.
> Any ideas as to what is going on???
> Wesley Hardman
> Scottsboro, Alabama

The first thing you do is look at  the full length of every string, from 
tuning pin to hitch in the area where the sound is happening. That will 
show you if the bridge is split, or a tobacco tin full of doubloons is 
stashed behind the strings there. The next place to look depends on the 
timing and quality of the sound being made. Grab loose hardware like the 
fall board guide system and lid snaps. Try to ascertain where the sound 
is coming from before you start fixing stuff. Another pair of ears is 
also invaluable for both triangulating noise sources, and 
troubleshooting method.
Ron N