My father used to tune pianos on weekends, and he showed me a little about them. First depending on the note, the deepest notes of a piano are one big string tightly wrapped around another large string. As you go up the scale, it becomes just one string being struck, then higher up 2 strings, and finally at the top 3 strings are being struck in order to produce the volume needed.
My thinking would be to press the 'soft pedal' down and keep it there, with a weight, giving the most damping of all the strings. Make sure that the top is down, and find a mattress sized sheet of memory foam to cover the piano with.
As for glass panes, I have used a quilt on a rack to hold it upright and put it in front of the window. Done. Same can be done behind the system. Incredible difference that you may or may not like. Adjust accordingly. |
I prefer still points under my equipment a bit pricy but the smaller ultra can be had just over $400, also your first reflections very important, on line you can get 2x4 ft panels with acoustic egg crate foam inside with different color fabrics or scenes .I made A little base where the panel sits in perfect like book ends in a way, you just put outside a foot or two from where you speakers are in front to the side ,it works great on reflections off the wall or whatever . When not using the piano ,either have made or buy a
slip cover ,this too will avoid all reflective surfaces. My friend have a Big Baldwin grand piano and has a nice slip cover with elastic sewn into the edges it tucks down around and under the frame. |
I suspect that placing a weight on the damping pedal (if your's has one) might not be a good idea in the long run, thus the simple damping method I mentioned.
Long story (not bothering to tell it) is that hollow stringed instruments (especially pianos) have an effect on room acoustics.
Discovered this when making live recordings in large domestic rooms/basements (basic mono tape recorders, but really good microphones) in the mid 60's.
We had a Baldwin Acrosonic upright that was a very nice sounding piano (would even be so now if properly refurbished).
DeKay
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Thanks edcyn, I’ll check to see if I have any undamped strings, and yell at them! |
You guys made me go check out my my piano, a 19th Century Mason-Hamlin upright. Anyway, the strings for the piano’s top eighteen keys are entirely undamped, and could conceivably resonate sympathetically. The strings for those keys, however, are under extreme tension. They did not respond one iota to my repeated shouts into the piano’s interior. In other words, I don’t think that, because it’s a musical instrument, the piano might be bolluxing up the stereo’s imaging. I do have to say, though, that any piano is a substantial piece of furniture, with a wealth of hard flat surfaces. |
Strings are already damped. |
One thing to keep in mind is that you can often compensate for deficits in one side of the room by adding more to the other.
Of course, it's hard to get a good stereo image when your left and right are not balanced but if one side is too reflective and can't be fixed, such as with big bay windows you don't want to hide you can treat the opposite room with extra thick absorbers and diffusion.
And don't ever forget the ceiling.
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Thanks for the great input! I didn’t even consider the idea of the strings ringing sympathetically… that makes a lot of sense. And I know the two sides of the room are acoustically very different, so that could be part of the issue, too.
I have the amp on BDR cones thanks to MC, which did wonders for the sound (really!), so I think I’ll work on the piano and room a little then revisit the amp. |
As @dekay suggested, damping the piano strings (two per keyboard note---that's a lotta strings!) is the first order of business. They ring like crazy when provoked, much more than an acoustic guitar or drumset. A folded furniture moving blanket will work great.
Second should be replacing the Venetian blinds with either diffusion or absorption. Ideally, you want the left and right walls to be as alike as possible, so whatever you do to one side, do to the other. "Sweeten" the highs with Townshend Pods? Before acoustically treating the room?! |
Try laying a soft weighted pad on the keys of the piano.
Perhaps a folded blanket with some smaller books/paperbacks on top - as an experiment.
Doing so will slightly damp the workings of the piano (without the hassle of placing something inside).
DeKay |
Hello phasemonger, as you have identified the range (highs) you are in good shape for continuing to a solution.
One - the piano is helping with diffusion but could be a source for reinforcement of a resonance.
Try covering at least part of the piano with absorption on the least damped portion (top ... ???).
Two - the glass will resonate and flex dependent on area (other specific characteristics) over some range.
Glass has a different absorption coefficient than drywall.
My guess would be that the glass is not problematic especially with the blinds.
Envious of the piano here !
Try adding some absorption behind the blinds as an experiment (a towel).
Three - being unfamiliar with the list of gear this may be an area to look into.
The good news is that high frequency modes are easy to treat with absorption or diffusion.
A single four inch thick panel would go a long way toward nailing down problem highs.
A hybrid panel would work well.
Be aware that treatment in one range can effect the room ballance.
As for a balance a live end / dead end approach should be a snap.
Work axially side to side high to low (room height / placement).
Good luck ... |
Like the way you saved the best for last. Keeps the readers interest to not get the answer until the very end. Imagine if I were to tell you right up front Townshend Pods will sweeten those highs? No suspense! Put them under the amp. They will help, for sure, and maybe save the amp. But if not then you simply move them to under the next better sweeter amp you buy to replace the elexr.
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