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#2028434 - 02/07/13 12:25 AM CP70B noise after key release? damper? your thoughts.  
Joined: Jan 2013
Posts: 7
hw2nw Offline
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hw2nw  Offline
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Joined: Jan 2013
Posts: 7
Los Angeles, CA
hi all,

just had my yamaha cp70b piano regulated and tuned. as i was playing i noticed something making noise in a particular octave of the piano upon releasing keys. any thoughts? please see the video below.

thanks!

[video:youtube]euoQ91K06Fg[/video]


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#2028443 - 02/07/13 12:42 AM Re: CP70B noise after key release? damper? your thoughts. [Re: hw2nw]  
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Supply Offline
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Supply  Offline
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Vancouver Island, BC, Canada
I would call the technician back to have a look. Perhaps a tool was left inside the action cavity. In any case it needs to be looked at.

#2028660 - 02/07/13 11:14 AM Re: CP70B noise after key release? damper? your thoughts. [Re: hw2nw]  
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Olek Offline
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Olek  Offline
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France
did he have to glue something ? you have just one note making that noise ?

Yes the tech should be called back.

It can be a screw of the key frame that is not tightened and the key is making noise on it at return, or a stranger element left under the keys.


DO you have the same noise with the sustain pedal engaged ?.
DO you have other notes with the same noise ?

the shank rest cushion is may be teared or missing, you can see that thru the strings (a white cushion)



Last edited by Olek; 02/07/13 11:18 AM.

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#2028873 - 02/07/13 06:00 PM Re: CP70B noise after key release? damper? your thoughts. [Re: Olek]  
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hw2nw Offline
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hw2nw  Offline
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thanks. i emailed the tech, i don't think he's going to be happy to come back.

the noise seems to go away with the sustain pedal engaged, and it's in about an octave of the piano, starting with the F below middle C up to the E above. i don't know if it matters but that is where the piano goes from the longer diagonal strings to the straighter ones (still 2 strings per note however)


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#2028886 - 02/07/13 06:27 PM Re: CP70B noise after key release? damper? your thoughts. [Re: hw2nw]  
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Olek Offline
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Olek  Offline
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France
Then may be the damper upstop rail is totally free

Or simply there is a pencil between the dampers and their levers

Or a tool ..

That kind of noise is noticed before leaving a job, so it is a tad mysterious.

Piano nicely tuned, seem to me

Last edited by Olek; 02/07/13 06:28 PM.

Professional of the profession.
Foo Foo specialist
I wish to add some kind and sensitive phrase but nothing comes to mind.!
#2028904 - 02/07/13 06:54 PM Re: CP70B noise after key release? damper? your thoughts. [Re: hw2nw]  
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Phil D Offline
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London, England
It doesn't matter if he's happy to come back or not - this is likely to be a result of his visit, so it's his responsibility to put it right. Probably a simple mistake!

#2030447 - 02/10/13 01:11 PM Re: CP70B noise after key release? damper? your thoughts. [Re: hw2nw]  
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Dave B Offline
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Philadelphia area
Sounds like it could be a loose hammer rest rail. Something that should have been checked while the action out.


"Imagine it in all its primatic colorings, its counterpart in our souls - our souls that are great pianos whose strings, of honey and of steel, the divisions of the rainbow set twanging, loosing on the air great novels of adventure!" - William Carlos Williams
#2030449 - 02/10/13 01:13 PM Re: CP70B noise after key release? damper? your thoughts. [Re: hw2nw]  
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Dave B Offline
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Dave B  Offline
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Philadelphia area
Sounds like it could be a loose hammer rest rail. Something that's a routine check when the action is out.


"Imagine it in all its primatic colorings, its counterpart in our souls - our souls that are great pianos whose strings, of honey and of steel, the divisions of the rainbow set twanging, loosing on the air great novels of adventure!" - William Carlos Williams
#2030555 - 02/10/13 03:29 PM Re: CP70B noise after key release? damper? your thoughts. [Re: Dave B]  
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Olek Offline
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Olek  Offline
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Joined: Mar 2008
Posts: 9,230
France
Originally Posted by Dave B
Sounds like it could be a loose hammer rest rail. Something that's a routine check when the action is out.

not if it goes away with the sustain pedal engaged, I believe.

Last edited by Olek; 02/10/13 03:29 PM.

Professional of the profession.
Foo Foo specialist
I wish to add some kind and sensitive phrase but nothing comes to mind.!

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