Baldwin "whoosh"

[Jon Page]

>  It is also similar to the sound of old, elongated tri-chords lifting
>through the strings...but this is NOT the source of the sound.

Probably the damper wire is slightly corroded and drags
on the guide rail bushing.

Usually polishing the wire with a wax and white ScotchBrite
reduces the noise.
-- 

Regards,

Jon Page
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