Mark, thanks for coming across this clip. Knupfer's claim is valid, artist's do leave tonal imprints on the soundboard from a strong performance. Whenchecking after a concerts I have heard is assertion. Bill Garlick taught the same theory about Steinway keybed design and the resonating cavity createdby floating the middle spruce slats of the bed. Energy transferred through theartist's fingers reaches through the keyframe to keybed setting the ungluedslats in vibration. This is the basis of his thinking. Checking the studs withthe sustain pedal down is critical for this connection to work. Theguy had his hands full with the pianist, better not mention names, declaring the "perfect" instrument isn't perfect enough for all pieces.
On Wed, 9/1/10, Mark Dierauf <pianotech at nhpianos.com> wrote:
From: Mark Dierauf <pianotech at nhpianos.com>
Subject: [CAUT] Nice inside-the-action-cavity camera work
To: "College and University Technicians" <caut at ptg.org>
Date: Wednesday, September 1, 2010,
11:26 AM
They must have used awfully small cameras for this, and either
several of them or else multiple takes. I'm really looking forward
to seeing this. Anybody heard of Mr. Knüpfer? This film could be a
great promo for our services. Click the little "watch" button on the
lower right of the photo to see the clip.
The recording of Bach's Art of the Fugue is already available, and
I'll be curious to see how the piano comes across.
- Mark
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