Soundboard crown

[Carl Meyer]

Lotsa good reasons, but in the cob webs I remember someone said that the
best reason for crown is that it serves as an expansion joint.

Whether it is forward or reverse makes no difference in that regard, but if
the board is flat it will oil can (that's a noun used as a verb).  Now that
will be guaranteed due to humidity.  Imagine the tuning instability when it
flips from concave to convex.  On the other hand if you could get it to
happen fast enough the resultant percussive sound could be used to keep the
tempo.

Carl Meyer Ptg assoc
Santa Clara, Ca.



---- Original Message ----- 
From: "Calin Tantareanu" <dnu@fx.ro>
To: <pianotech@ptg.org>
Sent: Sunday, August 10, 2003 10:36 AM
Subject: Soundboard crown


> Hello!
>
> I have followed the numeorus discussions on this list oabout rib-crowned
vs.
> compression crowned soundboards with great interest.
> However, I am asking myself if a soundboard always needs  crown in order
to
> work properly?
> I heard about some old pianos with no measurable crown that sound very
good.
> I have even seen some where no crown seemed left, yet the performance was
> very good. I read that harpsichords do not have crowned boards (except the
> Italian ones).
> So, why is a crown necessary?
> Would a flat board, but with enough downbearing for teh strings, work or
> not?
>
> Regards,
>
>
>  Calin Tantareanu
> ----------------------------------------------------
>  http://calintantareanu.tripod.com
> ----------------------------------------------------
>
>
>
>
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