I am a bit dissatisfied with my newly bought Yamaha U2 (made in Japan in 1999). Here's the story. My original problem was that the practice pedal was unusable because it took a large deal of force to make some of the notes (higher notes) produce a sound. Some of the notes (two or three)also had a metal sound to them (you only heard it when the sustain pedal was used while the practice pedal was engaged). The dealer sent a tuner who I thought did not know what he was doing. He tightened some screws under the hammers, but failed to fix it. He also adjusted a wire/cable underneath, which raised the felt paper on the practice pedal mechanism a bit. The metal sound disappeared. After a while, he cut the felt paper on the practice pedal mechanism and it improved a bit.
Anyway, after the "repair," I noticed a terrible echo in the higher notes when the sustain pedal was engaged. I am quite sure the piano did not have this problem before. Unable to get rid of the echo (I'm attaching a sample mp3 file if you want to hear it; you will need earphones), he blamed the room, and then the piano cabinet.
The dealer sent a different technician (I was told the first one was just a tuner) two days later. It turned out the felt paper being used to dampen the strings were skewed, so he cut and straightened it out. That made the keys softer and playable. He also voiced the piano to cut on the brightness since I have a small room.
But the problem is, several of the notes have "double" sound (it's like pressing the sol and sol sharp at the same time) when engaging both the practice and sustain pedals at the same time. I think about six or seven of the notes had this problem. The problem goes away when only the practice pedal is used. The second technician also failed to fix the vibration/echo that one hears when playing the higher notes. (Just a note: the notes that are affected are not just the ones without dampers.)
It's difficult to describe the echo/vibration, but it's like knocking on the brass inside the piano where the strings are attached. It's a bit loud and distracting if I play just one note with the sustain pedal. Otherwise, I barely notice it when playing a complicated piece.
I'm planning to record my play, but I don't have a decent microphone yet, so I can't say for sure the noise/echo will be noticeable. My question is, is it normal to hear an echo when playing the higher notes? Like I said, I am quite sure (okay, maybe 85% "sure") it wasn't there before. The echo/vibration is there even when all the removable boards are taken out. Please listen to the sound file (MP3) I am including here so you can hear for yourself.
About the MP3 file: The first note is without the sustain pedal. The second note is with the sustain pedal engaged, and that is when you will hear the echo. The echo becomes louder as the note becomes higher. Your advice is very much appreciated! http://uploading.com/files/VOJZZ4GD/echo.mp3.html