In article , Iain Churches
wrote:

"Jim Lesurf" wrote in message
...
In article , Iain Churches
wrote:

"David Looser" wrote in message
...

But a piano note is not a pure tone, it is rich in harmonics, and
it's well known that a very low note can be implied by creating the
harmonic structure that might relate to a missing sub-audible
fundamental, the human brain "filling in" the missing fundamental.
This trick is commonly employed in organs and is, I strongly
suspect, also how the Bosendorfer Grand Imperial appears to create
a note of 16.45Hz.

Well actually it's simpler than that. It has an extra octave at the
bottom end:-)

Is it? I can't say. But having a key for such a nominal 'note' doesn't
establish that it produces an audible component at 16.45Hz.

The Bösendorfer piano to which I refer, the Imperial Grand Concert
piano, was specifically built at the request of Busoni sometime around
1900. The keyboard has a 97 keys, with keys of the extra octave faced
in black ebony. Some versions of the instrument have a black hinged flap
which can be closed to when the normnal 88 key keyboad is sufficient.

One doesn't see these instruments often, and with a price tag of Euro
200,000 not too many people have one at home.

Interesting. But not really dealing with my point.


Can you point at some evidence to resolve this? I have no idea what
occurs in this specific case.

You may wish then to direct your question to:
http://www.boesendorfer.com/en/contact.html

TBH for my present purposes it is sufficient that your responses indicate
that you don't know. It seems quite unlikely to me. But I can live with the
uncertainty for now. :-) May inquire further at some future point,
though, when things that occupy me currently have been done.

Slainte,

Jim

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