[Dixielandjazz] Bechet's sarrusophone

Larry Walton Entertainment - St. Louis larrys.bands at charter.net
Fri Nov 16 13:04:52 PST 2007

There is a south American flute - I have one - that over blows the octave. 
The mouthpiece sort of is a "U" shaped notch at the end of the tube.  The 
Indians close the cylinder with their chin and blow down the instrument 
across the hole almost like a recorder.  There is no other hole except the 
"U" shaped notch at the end of the tube.  Is that a stopped instrument and 
if so why does it over blow the octave.  There is no cushion of air to 
resonate on the end of the tube as in a flute.  All the vibrations come from 
the end as in a recorder.  The recorder flute over blows the octave and it 
has it's vibrating air column at the end of the tube much like a clarinet.

BTW the site you listed wouldn't come up.
----- Original Message ----- 
From: "Paul Edgerton" <paul.edgerton at gmail.com>
To: "Larry Walton Entertainment - St. Louis" <larrys.bands at charter.net>
Cc: "Dixieland Jazz Mailing List" <dixielandjazz at ml.islandnet.com>
Sent: Friday, November 16, 2007 1:14 PM
Subject: Re: [Dixielandjazz] Bechet's sarrusophone

> Larry Walton wrote:
>> Does anyone know why the clarinet with it's straight bore jumps a 12th 
>> but
>> the flute over blows at the octave with a straight bore also?
> Yes, I do...
> (Oh, you wanted the answer? OK then!)
> A clarinet is acoustically a cylinder closed at the mouthpiece end. It
> has a pressure anti node at the mouthpiece end so it produces only odd
> partials. That is also why a stopped pipe produces a fundamental one
> octave lower than an open pipe of the same length.
> <http://hyperphysics.phy-astr.gsu.edu/hbase/music/clarinet.html>
> The hole in the lip plate of a flute means it has a pressure node at
> the mouthpiece, so it produces both even and odd partials.
> (Google is your friend)
> -- Paul

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