Press piano keys once but sound twice

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   I have A YAMAHA U1 piano, used about 10 years. Since last week, I found some keys sound very strange, when I pressed and held the key, the sound came out twice like I played two times, but I just pressed and held the key, why? And I noticed one G# sound like blocked, anything wrong with my piano?

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Huiying Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 09 Oct 2018 Points: 5	Post Options Post Reply Quote Huiying Report Post Thanks(0) Quote Reply Topic: Press piano keys once but sound twice Posted: 09 Oct 2018 at 11:27pm
	I have A YAMAHA U1 piano, used about 10 years. Since last week, I found some keys sound very strange, when I pressed and held the key, the sound came out twice like I played two times, but I just pressed and held the key, why? And I noticed one G# sound like blocked, anything wrong with my piano?

StevenKoh Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 03 Oct 2018 Points: 214	Post Options Post Reply Quote StevenKoh Report Post Thanks(0) Quote Reply Posted: 09 Oct 2018 at 11:45pm
	When we press and hold the key, the hammer will hit the string first and then bounce back to a fixed position. The action of your piano got problem, it make the hammers keep shaking after bouncing, which will hit the string twice or more, or cause the hammer hitting and leaning on the string to generate a blocked tone. To solve this problem, your piano need regulation service.