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Yamaha Clavinova Distorted Sound
#2948418 02/18/20 08:15 AM
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Hi,

After trying to search for various answers and solutions, I happened across this forum and thought I'd join up in the hope that someone can help.

I recently purchased a Yamaha Clavinova CVP-20. Unfortunately, after only 6 weeks it has developed a fault where the sound is completely distorted (it sounds like a very bad electric guitar). I'm quite upset, not because of the money I spent only for it to fail so quickly, but because I've really been getting back in to piano playing and enjoying it only to be stopped dead in my tracks.

I have tried various methods to try and rectify this but to no avail. I have also tried a MIDI cable to connect it to my laptop as a temporary short term solution. Unfortunately this hasn't proven very successful either (it's all connecting OK and I'm getting sound, but it's suffering from a latency issue that I can't seem to sort out). So I'm quite desperate to get the sound from the keyboard sorted.

I know I can get replacement parts to sort the issue (I think this is what I need), but after opening up the keyboard, I'm at a loss as to what I need to do.

I have searched for various tutorial videos, and also searched for a parts manual with diagrams, but I'm not having much luck.

Can anyone please help me?

All the best

Steve

Re: Yamaha Clavinova Distorted Sound
Steve Ward #2948425 02/18/20 08:35 AM
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Is it an old pre-loved instrument?


No good but carry on regardless
Re: Yamaha Clavinova Distorted Sound
Steve Ward #2948426 02/18/20 08:40 AM
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Yes. I don't know how old exactly. I bought it just after Christmas for £160.

Re: Yamaha Clavinova Distorted Sound
Steve Ward #2948428 02/18/20 08:43 AM
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Hi I don't know much about the technical aspect of it but one question to consider would be, is the sound only distorted on the speakers, or also when using the headphone jack?

Re: Yamaha Clavinova Distorted Sound
Steve Ward #2948431 02/18/20 08:52 AM
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On both the speakers and the headphones, which is why I'm assuming it's a board failure somewhere.

Re: Yamaha Clavinova Distorted Sound
Steve Ward #2948440 02/18/20 09:22 AM
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Originally Posted by Steve Ward
Yes. I don't know how old exactly. I bought it just after Christmas for £160.


Yamaha CVP-20 was released in 1988.


Kawai Novus NV5
Re: Yamaha Clavinova Distorted Sound
Steve Ward #2948459 02/18/20 10:21 AM
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Do all the keys play properly? Do all the control buttons work? If so that means the logic and tone generation are working. It's not likely that the distortion comes from a faulty DAC.

So it's most likely a problem in the audio amplifier chain. You'll need to have a tech look at that.

Re: Yamaha Clavinova Distorted Sound
Steve Ward #2948462 02/18/20 10:30 AM
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When you say do the keys play properly, do you mean does each key generate a sound?

If so, then yes. Each key generates a sound, but it's exactly the same sound from each key (horrible distorted sound), although the pitch/tone does change.

The control buttons all work in the sense that when I press them, the green LED indicates it has been selected. But that does not affect the sound at all. It's still the same.

It's also worth noting that the tunes I have saved in the memory slots also play in the same way (horrible distorted sound).

The volume also works as it should.

Re: Yamaha Clavinova Distorted Sound
Steve Ward #2948532 02/18/20 01:10 PM
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OK ... you need a tech to perform the repairs.

Find a repair shop and get a repair estimate. If the repair is cheap enough then go for it.

But I wouldn't bother doing this on a piano so old. I'd replace it.

Re: Yamaha Clavinova Distorted Sound
Steve Ward #2948855 02/19/20 05:10 AM
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Thanks for the info and recommendation. Glad I checked in before spending more money and attempting a repair that likely wouldn't have resolved anything.

Is there generally much interest in people buying faulty digital pianos? I'm hoping to recoup some of the money I spent on it and put it towards a new one.

Re: Yamaha Clavinova Distorted Sound
Steve Ward #2949035 02/19/20 01:02 PM
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The chance of someone giving you money for a broken digital piano of that age are likely somewhere between zero and none. Just call that a learning experience and get a new one. You can find lots of recommendations here for good ones in your price range.


If you're a zombie and you know it, bite your friend!
We got both kinds of music: Country and Western!
Casio Celviano AP-650
Re: Yamaha Clavinova Distorted Sound
Steve Ward #2949041 02/19/20 01:09 PM
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That's what I thought.

If I can get the latency issue sorted from the MIDI cable, I'd be a happy to keep it as a side project.

A friend has recommended the Korg B2SP, which just falls within my price range. I've also seen the Casio PX760 that is the same price. Not sure how they compare in terms of quality though.

I'm assuming the gear4music own brands are a bit of a dirty word around here?

Re: Yamaha Clavinova Distorted Sound
Steve Ward #2949079 02/19/20 02:17 PM
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Whether a dirty word or not ... house brands are best avoided.
They look good.
They're priced low.
And they're pure junk.

Re: Yamaha Clavinova Distorted Sound
Steve Ward #2949116 02/19/20 03:19 PM
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The MIDI latency issue probably isn't on the Clavinova side, so you just need to tinker around on your computer.

...which then is a completely different topic on its own. Like what kind of VST are you trying to use and is there an ASIO driver involved etc.

"Windows Audio" may also work, so ASIO isn't always needed. And e.g. Pianoteq has a free (somewhat limited) demo version and it's a small download and doesn't require much "configuration" to get started.

One question in the actual topic would be is there a "LINE OUT" in back of the Clavinova and does it provide clean sound? I guess it might be possible if it bypasses the broken amplifier(?) feeding the speakers and the headphone out.

In that case you could say that "The Line Out DOES work" when/if selling the piano for a smallish amount of your preferred currency.

But of course it's not a very desirable instrument. It's not even full 88 keys. But it's already vintage! 😀

Re: Yamaha Clavinova Distorted Sound
clothearednincompo #2949395 02/20/20 05:29 AM
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Quote
what kind of VST are you trying to use and is there an ASIO driver involved etc.


I'm using the 'Virtual MIDI Piano Keyboard' software with 'VirtualMIDISynth'. My soundcard is a standard RealTek, and I don't believe that supports ASIO. I have read about a driver called 'ASIO4ALL' which I need to try out.

Quote
One question in the actual topic would be is there a "LINE OUT"


Yes. I can get decent output via my laptop, but there's about a half second delay between key press and the sound generated.

To be honest, if I can get it working via my laptop then I'd be happy to carry on using it that way and at least get my monies worth out of it whilst I save up for a new one.

I'll have a look at the Pianoteq that you've suggested. I'll give anything a try at this stage.

Thanks for your help.


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