DanDan wrote:'Disinfect a friend...'
I love that. Strange times we are living through indeed.
I am afraid to monkey with the lid myself. When my tech comes over to tune the piano eventually, I can have him remove the lid so I can record once and hear the difference just to try it. If you follow my stuff above, it really was the lid and music stand that was affecting the piano tone quite a bit.
It seems to me that any mic that is getting strong reflections from these big hard surfaces combined with the direct from the strings is going to be comprised in tone. At least that has been my experience. What the audience hears though is mostly what reflects from the lid I guess. But get in close on the side of the piano and you get both direct and lid reflections.
The real clincher for me was when I moved the SM81 around to find a place for it. All by itself it had the phasey, hollowed-out sound anywhere under the lid. So it was not the combination of mics, it was the single mics themselves that had problems for me.
The mics out in front of the lid get away from the lid reflections. Less liddy-sounding.