As stated by some users on Sweetwater: "notice the black keys on CP73 produce soft sound when played fast and hard"
I know Yamaha had been working hard on this product and the CP88...
BUT this seems a big BUG!!
That's not something you expect for such an instrument.

Can other users confirm this weird behaviour?
My CP73 is on the way so I'm going to check that in my unit.
and if Yamaha does not have a response soon for this problem, sadly I will have to return it.

Hi all,
I was waiting for this 73-key instrument to see the light. I love the form-factor and layout, the weight, its piano sounds and many of the features. Unfortunately my unit (V1.10 OS) came with the problem that other people are talking about. The black keys spot this weird response to the keyboard action. You don't notice it until you play a fast passage with repeated notes. I really expect Yamaha take action on this for what, otherwise seems to me as one of the coolest keyboards out there in this 73-key format. In the meantime I'm going to return it. 🙁

I have not experienced this problem.

Are you experiencing it on EVERY sound, or just certain sound?
If you change the velocity curve is there still and issue?
EXACTLY what is happening: Is it attenuation when played at high velocities?
Are you selecting sounds from the Live Set or using the category switch and selecting sounds there?
Are you certain that NO effects engaged? Especailly any dynamics processing like the section compressor which would do exactly what you are describing.

I would love to help you out, but I need more information.

Also, if you're comfortable doing it - you could play repeated notes where you hear an volume difference between repeated notes while also monitoring the MIDI output. DAWs have built-in MIDI monitors or plug-ins. There are also stand-alone utilities for looking at the note velocities. If you do not see dramatic differences in the note velocity as reported by MIDI - then something in the effect domain (like compression - which can be turned on/off) is more likely. This would at least take your focus away from the keybed and electronics to sense the notes you strike.

Thanks for the replies.
Unfortunately my unit is now on its way back to the dealer but I'll try to give you all the responses.

@Blake

Are you experiencing it on EVERY sound, or just certain sound?

Yeah, I've experienced this issue with all pianos. I've really not put attention on other sounds.

If you change the velocity curve is there still and issue?

Yes, except with fixed setting (obviously). That's the first thing I tried.

EXACTLY what is happening: Is it attenuation when played at high velocities?

I'll try to describe this the best I can. This happens ONLY WITH THE BLACK KEYS. You play a key, say, with a high velocity and then you repeat it again (fast enough) at the exactly SAME force and then you get a lower vel value. Subsequent (fast) repeated notes get the same value no matter how hard or soft you play them. So in the end you are loosing the control of the dynamics.This only gets "normalized" after you wait or you go with the same key in a slower fashion (repetition). Notice that white keys are responding as expected.

Are you selecting sounds from the Live Set or using the category switch and selecting sounds there?

Doesn't matter.

Are you certain that NO effects engaged? Especiailly any dynamics processing like the section compressor which would do exactly what you are describing

Pretty sure.

@Jason

@Jason
Yeah, totally right. I've could have done a test involving a MIDI monitor. BUT:
I had not a lot of time left as I was in the middle of an album production
And Mr. Google kindly send me proof that the issue existed with other CP73 units, as other users mentioned it.
So, I don't know if that problem is within a particular number of production units.
You guys that have one CP73 in front of you can confirm if you can replicate this problem.

regards

The Yamaha development team is looking into this and I'll keep you posted.

Nice to hear,@Blake
Looking forward!

Same here !!!

Hope they'll fix it !

@Blake
Please contact me if you need the CP73's serial number

Any news on this topic ?
Did Yamaha confirm ?

We are still looking into it. Stay tuned.

Is this fixed now with V1.20 ???

No issues on my brand new CP73, I tried recreating it in store and on mine. Velocity on black notes performs as expected and nothing I play is negatively affected. I think people are failing to realize the nature of digital pianos (especially dual sensor keybeds). After you get past a certain speed you get mis-strikes because the key itself has not returned and you are trying to hit it while its down. This is not a bug, it is a trait that all two sensor keybeds have.