Re: Re: [Harp-L] Comb material

["Rick Dempster" <rick.dempster@xxxxxxxxxxx>]

In reference to the current topic,there seems to be a general failure to
grasp the technical difference between instruments that transmit
vibration to the air through resonating matter (like a guitar or piano)
and the harmonica, which is a 'siren' and produces it's sound in the
same way that an aeroplane propellor produces it's pitched drone, which,
like the harmonica's reed, vary's according to the speed at which it
moves.
         Here in Australia, there is a native instrument used in sacred
ceremonies, commonly called a 'bull roarer'. It consists of a flat stick
with a hole in one end and a string tied, which is then used to swing
the thing in a circular motion. It produces a pulsing drone, which
varies in pitch according to the speed at which it is rotated.
        This is a simple way of trying what I am talking about without
having to head for the local airport.
        It may still not convince you that variations in comb material
do not effect pitch, but it might go some way in helping people to grasp
what a harmonica is, and how it differs from other instruments.
         I am still unclear myself about the differences or
relationship between the harmonica and fixed reed instruments, such as
clarinet, sax etc., which must bear similarities to  non-reed wind
instruments such as trumpet, flute tenor horn, trombone etc. etc.
        Any info on these subjects would be much appreciated by 
Yours's truly,
RD



>>> Jeff roulier <jroulier@xxxxxxxxxxxx> 23/04/2007 15:10 >>>
At 11:49 PM 4/22/2007, you wrote:

>Zombor Kovacs wrote:
> > It is not obvious that comb material doesn't matter.
>
>I think what's obvious, at least in terms of discussion on this list,
>is that there is a preponderance of empirical evidence that comb
>material does not matter, and with the burden of proof on those who
>say it does, little has moved this topic in several years.


You're making a common error in logic.  Both sides bear the burden of 
proof.  While it's true one cannot prove a negative.  When someone 
says comb matter doesn't matter.  He or she  is making a positive 
statement about reality albeit using negative grammatical syntax.  If 
one said, I don't think the evidence supports the fact that comb 
material matters, then the burden stays with the person who comb 
material does matter.  The burden shifts, however to the person 
saying the comb material in a harmonica does not effect the 
tone.  It's a subtle difference in grammar, but a large one in 
meaning.  Vern, for example, offered proof for his position that comb 
material didn't matter.

That's why when debating theists I'm always careful in saying I don't 
the there is enough proof, or the arguments for the proof are not 
convincing.  I never say there is no God because then I'd have prove 
that.  And unlike a harp  I cannot put him in a lab or take him apart.


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