Testing the "whizzer plate". Playing "The Wall" from Kansas (A piece I really enjoy and am very familiar with). At the end, the last note is very high and held for a long duration. I was able to place and remove the "whizzer plate" a couple of times... as soon as it touched the panel, the note got bolder and overtones appeared. I MAY be onto something. Once I glue one on, I'll have a better test, because I'll be able to check the directivity. If you can only hear it in the sweet spot, then it's a fail. Working on other panels (nicely cut and shellacked) as we speak.

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