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I love my Casio AP450 but there's one aspect of it I could do without. When a note is pressed there is a clunk sound that is added to the tone; I guess its the sound of hammers falling. It is definitely non-acoustic because if I turn the volume down so does the clunk by the same amount. Its more noticeable at higher notes.
Does anyone know if there is a setting that turns it off?

Last edited by LarryShone; 01/10/20 02:08 PM.

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Welp, neither the specifications nor the user's manual talks about any additional action noises (like e.g. "key fallback noise" when releasing the key) so whatever sound is there is permanently there.

Apparently(?)

Originally Posted by LarryShone
It is definitely non-acoustic because if I turn the volume down so does the clunk by the same amount.


Are you talking about a clunk when the key goes down or when it comes up?

That Casio does actually measure both speeds, but since there's no "fallback noise" I suppose you mean the key going down.

Of course the mechanical noise -- recorded along with strings vibrating -- varies with the strike velocity used when sampling that velocity layer of that note. And as the clunk is part of the sample (if it is) it follows the volume control too.

I don't have a Casio and haven't paid attention to any clunks in audio samples.

(There's one on the AP-450 web page: https://www.casio-intl.com/mea/en/emi/products/ap450/)

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Originally Posted by LarryShone
I love my Casio AP450 but there's one aspect of it I could do without. When a note is pressed there is a clunk sound that is added to the tone; I guess its the sound of hammers falling. It is definitely non-acoustic because if I turn the volume down so does the clunk by the same amount. Its more noticeable at higher notes.
Does anyone know if there is a setting that turns it off?


I noticed that with Pianoteq (Bechstein Prelude) and it was very bothersome. I reduced a little two parameters, "key release noise" and "sustain pedal noise", to make it more to my taste.
You need to verify in the user manual of AP450 if you may edit parameters of the piano sounds and look for similar parameters.


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Originally Posted by clothearednincompo
Welp, neither the specifications nor the user's manual talks about any additional action noises (like e.g. "key fallback noise" when releasing the key) so whatever sound is there is permanently there.

Apparently(?)

Originally Posted by LarryShone
It is definitely non-acoustic because if I turn the volume down so does the clunk by the same amount.


Are you talking about a clunk when the key goes down or when it comes up?

That Casio does actually measure both speeds, but since there's no "fallback noise" I suppose you mean the key going down.

Of course the mechanical noise -- recorded along with strings vibrating -- varies with the strike velocity used when sampling that velocity layer of that note. And as the clunk is part of the sample (if it is) it follows the volume control too.

I don't have a Casio and haven't paid attention to any clunks in audio samples.

(There's one on the AP-450 web page: https://www.casio-intl.com/mea/en/emi/products/ap450/)

Yes its key down. It has a reverby sound to it, because it simulates sympathetic vibration of other strings.


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Originally Posted by LarryShone
[the noise sounds on] key down. It has a reverby sound to it, because it simulates sympathetic vibration of other strings.


These - the thump and the resonance on higher undamped notes - is reproducing what the piano actually does. This is probably what most DP buyers want - an instrument that faithfully reproduces a real piano. If the hammer sound was removed, you'd have an instrument with a cleaner tone delivery perhaps but it wouldn't be a piano as such.

So the hammer noise and resonance are probably in the main sample and therefore permanent unlike less essential artifacts such as pedal clunks and damper release noises.


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