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Some keys are much louder than others in new Yamaha NU1 #2149359 09/13/13 11:18 AM
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helloworld1 Offline OP
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I just got my new NU1 and found a rather unpleasant thing. The D#5 and E5 key are much louder than other keys while G4 is a bit quieter. I used midi velocity to measure, using same force on C and E5, the E5 key is 70 while C5 is 50 on average. The velocity are almost identical for other pairs of keys like C4 and E4 or D5 and F5. Any one has the same problem?

Last edited by helloworld1; 09/13/13 01:34 PM.
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Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2149444 09/13/13 12:58 PM
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spanishbuddha Offline
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I've not measured with midi, and don't know how to ensure the same force is used, but the only one I noticed is when playing Gnossienne 1 the D#5 can catch you out. I'm not sure it's louder but does have a ringing clarity that sounds louder. The E5 in the same piece is a grace note and I have not noticed any others. Strange how I don't notice it with Für Elise? So I assumed it was me.

Re: Some keys are much louder than others in Yamaha nu1 [Re: spanishbuddha] #2149481 09/13/13 01:39 PM
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helloworld1 Offline OP
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To ensure the same force. I basically put volume to minimal, use two finger to press two keys for 5 to 10 times and them look at the velocity value in the midi and average them.
E, g, I press C4 and E4 for 5 times the value of C4 is like: 47, 55,49,61,49 and E4 is like 49, 54, 52, 63, 42.
And same experiment on C5, E5,the E5 is always 10 to 20 higher than c5.
The effect is very noticeable for playing anything especially scales.

Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2149510 09/13/13 02:21 PM
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I have N2, so I'm not looking to buy, but I did get a chance some months ago to try NU1 and I noticed that issue although I can't confirm if it was the same notes (probably was.) The N2 doesn't have that problem.


AG N2 | ES 110 | REFACE CP | GK MK & MP amps
Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2149532 09/13/13 02:59 PM
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helloworld1 Offline OP
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If it is the imperfect sample causing this, it should be fixed by using external library.
But if it looks more mechanically / electronically defect. All keys should response to the same force more or less the same way.

Last edited by helloworld1; 09/13/13 03:00 PM.
Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2149590 09/13/13 04:35 PM
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I had a similar same issue with an NU1 I tried in the shop. Then I tried other 2 of them, and I could find no defects. But I think the risk of a not perfect model still remains...

Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2149596 09/13/13 04:46 PM
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It might be defective/dirty sensors under the keys. Over time, I've experienced issues with keys sounding louder/softer in relation to other keys; however, not with a brand new piano. You should contact YAMAHA regarding the issue.

Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2149687 09/13/13 07:41 PM
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helloworld1 Offline OP
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Called the dealer and will schedule a tech to take a look. I will report back and maybe with some photos for cracking the beast open.

Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2149856 09/14/13 04:46 AM
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enzo.sandrolini Offline
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Hello
I have a NU1 since 1 year now, no problem at all, either with internal sound, or with virtuql piano connected
It works perfectly...you probably have a defective unit..sorry


Music is a lifestyle
(Happy Yamaha N2 and Roland FP90 owner)
Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2152357 09/17/13 05:57 PM
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helloworld1 Offline OP
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In very rare cases when I touch a key very lightly, it will generate a very loud sound. It happens once or twice in an hour long playing. Do you have the similar issue?

Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2153158 09/18/13 04:51 PM
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helloworld1 Offline OP
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I got the piano opened up by a technician. He didn't really do anything other than running some debug mode and putting everything together again. Then the problems are mysteriously gone.

I took some photoes of the piano
http://www.pianoworld.com/forum/ubb...serviced%20and%20opened.html#Post2153148

Last edited by helloworld1; 09/18/13 04:51 PM.
Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2172341 10/26/13 12:27 PM
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Hmm... I seem to have developed a similar problem on my E#6... I get the 'very occasionally' thing too. Good to hear a tech visit sorted it, but not so good this will be the second time I've had to get someone out - last month had to replace a fizzing speaker... Not so good since I've only had it for 3 months...

Re: Some keys are much louder than others in Yamaha nu1 [Re: Bluesinlondon] #2172524 10/26/13 09:12 PM
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helloworld1 Offline OP
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Originally Posted by Bluesinlondon
Hmm... I seem to have developed a similar problem on my E#6... I get the 'very occasionally' thing too. Good to hear a tech visit sorted it, but not so good this will be the second time I've had to get someone out - last month had to replace a fizzing speaker... Not so good since I've only had it for 3 months...


The tech can not resolve the intermittent loud key issue. I don't like nu1 at all for now due to this issue. I can't bear a loud note in debussy's reverie or works like that. I will consider return it. My P155 is more fun to play.

Last edited by helloworld1; 10/26/13 09:13 PM.
Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2172650 10/27/13 07:31 AM
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Oh, I thought you said the problems were gone? So what happend? Did the tech say there was nothing they could do, or that there was no problem it fix?

Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2172652 10/27/13 07:36 AM
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Oh, I thought you said the problems were gone? So what happend? Did the tech say there was nothing they could do, or that there was no problem it fix?

Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2172662 10/27/13 07:54 AM
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Helloworld1: I returned my NU1. I had the intermittent key issue as described in this thread and a midi transmission issue with the sustain pedal. Yamahas customer service and desire to stand behind the NU1 was lacking. Should you return it, you won't be the first (nor, I suspect, the last). It seems there have been a number of people on here with objectively reasonable quality issues with the NU1.

Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2173241 10/28/13 03:02 PM
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helloworld1 Offline OP
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The tech fixed 3 keys that is always louder than before. But The tech said he couldn't fix intermittent loud key because he could find a problem in the mechanism (The sensor mechanism disappointingly simple). He will contact Yamaha. But I haven't checked back.

Last edited by helloworld1; 10/28/13 03:02 PM.
Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2173262 10/28/13 03:44 PM
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hmm...intermittend loud keys: whatch your technique!
If you don't release the key completely (for repeated notes), you can produce a unexpected loud sound since some resistance is missing and you kind of "fall through" the key with the force you apply. You don't have to overcome the initial inertia of part of the mechanism.
I experience some similar effects on accoustic uprights. Maybe that's a general bug/drawback (or feature?) of some upright keyboard design, which is eventually more expressed on the NU1 because of the way the key veolicity is detected.
Try it out.

Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2173282 10/28/13 04:27 PM
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helloworld1 Offline OP
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No, not technical issue. I play debussy's reverie. Most pp part, I use very very soft touch, but sometimes, a sudden FF comes in and ruin my whole mood. I played on Yamaha P155, Casio PX 350, Steinway model B, Yamaha U1. None of them have the problem. If you do not lift the key completely and press again, it should either make slightly louder sound or no sound at all not an FF.
Also did I mention that NU1 can't produce FFF using build in piano sound and velocity curve? I solved it using midi and use a customized velocity curve.

Last edited by helloworld1; 10/28/13 04:27 PM.
Re: Some keys are much louder than others in Yamaha nu1 [Re: helloworld1] #2173307 10/28/13 05:24 PM
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I'm not convinced looking at your examples.

Steinway model B: Grand piano (action)
Yamaha P155, Casio PX350: the action tries to simulate the one of an accustic grand, very forgiving to play

Not knowing the U1, it should be the most comparable to the NU1.
The NU1 is not easy to play at all. Playing e.g. pp-chords like in the mentioned Debussy's reverie can be a challenge.

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