HI Everyone, its my first post, and I am hoping that some knowledgeable folks may be able to help with some troubleshooting on my (mostly unused!) Yamaha 3710.
I am a professional percussionist in Australia, and also teach at tertiary secondary and primary levels. Previously I have owned a second hand M48 which was good for me for 20 years, but I took the chance to upgrade to a brand new Yamaha on a decent deal. It is a relatively new instrument- 3 years old, but only done 3 gigs due to COVID, where it sat idly in my studio for 18months.
In my first recording session last month, I discovered 2 main problems- buzzing between the bars and the felt (probably around 20% of the bars have a noticeable buzz on the recording, but there are several notes which are very obvious and under the watchful gaze of Neumann microphones, very distracting and unforgiving. Live and in the room, these buzzes are there, but not as pronounced as what is heard in the recording (see attached).
The other problem is that when playing repetitive notes (pedal NOT engaged) from around B4- E5, the string does not stay in the groove of the pins, and after about 10 notes the string moves out slightly and the notes sound about double the length of the rest of the instrument- ie inconsistent. (EDIT- I was able to fix this issue by tightening the spring underneath the dampener bar, however it did introduce other bar buzzing anomolies on other notes.)
For recording sessions, it has been a stressful experience for me with hours of time trying to mitigate particularly the buzzing bar issue. I am now looking at the distinct possibility of hiring another vibraphone to complete this project on my own dime, which is definitely not what I expected to happen on purchasing this instrument, especially with it having so little use.
In terms of moving it, where I imagine damage is most likely to occur, I have been careful with it, packing it down for the first gig only, and then hired a van for the remaining gigs to protect the frame, so I feel as though I have looked after as well as I could.
I have tried tightening and loosening the dampener screw, rethreading the bars using a musser vibe chord, rebuilding the frame to see if it was a little bit off kilter. Today, I also borrowed my colleagues felt and bars from a different 3710 (purchased the same time as mine) after he reported similar problems with the buzz. Swapping felt bar and bars did not change anything. My fear is that it is coming from the bars themselves, but I cannot rule out the relationship with how it is dampening. Does anyone have any insight ito this issue? If so, I would be extremely grateful.
I have taken this up with Yamaha Australia and am waiting patiently for a response, but in the meantime, I thought I would put it out there to see if anyone else had experienced a similar issue, and if so were you able to resolve it?
I have attached the link to a recording of me going up the instrument chromatically. Recording chain- matched pair of Neumann km184's, spaced at ear level into a Metric Halo ULN8.