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From: SNaru~-online.de (Siegfried Naruhn)
Date: Fri, 18 Oct 96 12:50 +0100
Subject: RE: Re: tone (was breathing)

On 10-17-96 Jim Bassey answered to Mike partly with:

>> As the reeds in question were the lower two, I think it's safe to assume
>>that the unusual valve construction was due to the larger than normal
>>size of the valve required to cover these large lower reeds.......

>> I would consider the surface area in contact with the reed plate
>>(the point at which it will stick) to be the most important and I would
>>suggest that this is what the cupped valves are designed to reduce
>>(though I have never seen these)

No, these are not the reasons why the valves in question are actually cupped. It
has been noticed at former models of the 64s that the great amplitudes of the
reeds in the two lowest chambers caused a touch of the reeds with the valves. To
prevent this sound impeding effect, the valves get their actual design.

It is interesting that only the four blow reeds have these cupped valves. The
draw reeds (placed outside the plates) have of course the same great
amplitudes, but there is no room inside the chambers to place such valves
also for the draw reeds. The diagonal cut ends of the plastic layers seems to be
destined for stability purposes.

I think it not necessary to attach such cupped valves also at bluesharps because
of the opposite placing of blow and draw reeds.

So, if you have seen such valves never,
you don't miss nothing to see them ever.

Siegfried Naruhn