Korg Forums Forum Index Korg Forums
A forum for Korg product users and musicians around the world.
Moderated Independently.
Owned by Irish Acts Recording Studio & hosted by KORG USA
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Ringing sound on A4 Key on all Factory Grand Pianos

 
Post new topic   Reply to topic    Korg Forums Forum Index -> KORG SV-2
View previous topic :: View next topic  
Author Message
jwatson



Joined: 03 Sep 2020
Posts: 4
Location: California

PostPosted: Thu Sep 03, 2020 10:39 pm    Post subject: Ringing sound on A4 Key on all Factory Grand Pianos Reply with quote

Hello,
I am experiencing a ringing sound on my A4 for all grand pianos in the Piano 1 Sound. Grand pianos include German Grand A1, Italian Grand A2, Japanese Grand A3, and the Austrian Grand A4. I do not hear the ringing sound on the Japanese Upright A5. I have tried turning off effects. I have tried turning off the hall effect. I have tried changing the tuning, but then that introduced a beating effect when playing an octave. A repair center suggested I do a factory reset. I did the factory reset through the editor and it did not fix the issue.

I was able to record the sound
https://drive.google.com/file/d/16ExBPhBAVYPpHZMCw3Rzxscw-91uXOxY/view?usp=sharing

Please help me get rid of this ringing sound.
Back to top
View user's profile Send private message
voip
Platinum Member


Joined: 27 Nov 2014
Posts: 2659

PostPosted: Fri Sep 04, 2020 9:04 am    Post subject: Reply with quote

It would be useful to hear a few more notes played either side of A4. There is no clear ringing to be heard on the recording using headphones.

Do you hear the ringing when using headphones? Just wondering if it might be a room or speaker resonance.

.
Back to top
View user's profile Send private message
jwatson



Joined: 03 Sep 2020
Posts: 4
Location: California

PostPosted: Fri Sep 04, 2020 3:59 pm    Post subject: Reply with quote

Yes, I can hear it in my headphones. It is right at the beginning of the note. It's kind of a cringy sound.

Thank you for taking a look at my problem.
Back to top
View user's profile Send private message
voip
Platinum Member


Joined: 27 Nov 2014
Posts: 2659

PostPosted: Fri Sep 04, 2020 8:13 pm    Post subject: Reply with quote

Was the recording made using a microphone close to the speakers, or directly from the Line Outs?

.
Back to top
View user's profile Send private message
jwatson



Joined: 03 Sep 2020
Posts: 4
Location: California

PostPosted: Fri Sep 04, 2020 10:58 pm    Post subject: Reply with quote

The following is the recording I posted above at 0.5 speed. Just the A4 key at vol7, on the Austrian Grand.

https://drive.google.com/file/d/1l0cnKN8Xf7ZkJWyVSV6cyWPfUaa-Yj3y/view?usp=sharing

The following is the notes next to the A4 key. This sound is G4, A4, B4, A4, G4. All at volume 8. Sitting at the piano, phone is about 2ft from speakers. The sound is Piano 1 the Austrian Grand (which happens to be selection A4). The issue sound is most prominent on this Austrian Grand.

https://drive.google.com/file/d/16_F82MO9GRLvAqpPLe8pIANMNB24tx8m/view?usp=sharing

I did notice that if I play the recording on my phone you can't really hear the issue sound.
Back to top
View user's profile Send private message
voip
Platinum Member


Joined: 27 Nov 2014
Posts: 2659

PostPosted: Sat Sep 05, 2020 9:55 am    Post subject: Reply with quote

All I can hear is a slight low frequency "grumble" type of sound, but that is present on all three notes played in the second recording, and might be a cabinet resonance effect, or a piano body sound. A4 is also louder than G4 and B4 in that recording.

When comparing the first recording with the recording linked to in the original post, the sounds seem to essentially be the same, to my ears at least, with only the slight "grumbling" referred to above, but no ringing, as such.

It's worth considering that the samples used have been carefully recorded, including all the nuances and quirks of the pianos used to make the samples, although one wouldn't reasonably expect three different pianos to have the same quirks.
.
Back to top
View user's profile Send private message
jwatson



Joined: 03 Sep 2020
Posts: 4
Location: California

PostPosted: Wed Oct 28, 2020 8:09 pm    Post subject: Reply with quote

I took my KORG-SV2S to a Korg repair center. The repairman was also unable to hear it, but he was however able to feel it. The frequency is too high for most hearing. He placed his hand on the left speaker and could feel the vibration on the notes that I indicated were bad. He could identify notes that had it of varying degrees without me saying anything. He said he will contact Korg and see what they would like him to do. The instrument is still under warranty so the repairman said most likely Korg would pay for the repair. The repairman believes that it could be some mounting issue with the speaker, a loose screw, etc. The other things he thought might be the problem is a sympathetic resonance with the case and speakers, which I hope isn't be the issue. I will make another update once I have been given more information or a repair has been made.
Back to top
View user's profile Send private message
CouchTurnip



Joined: 09 Jan 2021
Posts: 1

PostPosted: Sat Jan 09, 2021 6:24 am    Post subject: Was it the tube? Reply with quote

I'm guessing you've had the issue fixed by now, but for anyone else landing here, I'd like to suggest that the tube/valve was the culprit.

TL;DR: If you are experiencing resonance on your SV-2 , take a look at the tube!

My new SV-2 (an 88S with built-in speakers) had the same metallic resonance/buzzing that I can hear in the linked samples. I originally thought it was the left speaker, or some part of the cabinet, vibrating. However, turning off the speakers eliminated the issue entirely, so it wasn't in the electronics or sound samples.

Removing the clear plastic tube cover allowed me to - VERY CAREFULLY! NEVER TOUCH IT WITH FINGERS! MAY VOID YOUR WARRANTY! - place a pencil eraser against the tube, which lessened the resonance considerably.

So I took the instrument back to the shop. After the technician had completely pulled it apart, he pronounced it unfixable. I will note he did not try replacing the tube, as he was convinced it was in the housing. But after he found another unrelated defect, he deemed it a faulty unit, and ordered me a replacement unit under warranty.

The new keyboard does not have the tube resonance issue.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Korg Forums Forum Index -> KORG SV-2 All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group