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MMD > Archives > December 2014 > 2014.12.05 > 03Prev  Next


Playing 88-note Rolls On a Duo-Art
By D. L. Bullock

The problem you describe, of notes playing weakly when played rapidly,
is usually a sign of too much valve travel.  The only time a valve
is leaking (assuming the system is airtight) is when it is in motion.
The valve should travel _only_ 0.035" with 0.033" the minimum allowable
and 0.040" the maximum.

This indicates the need for a valve rebuild and if it was rebuilt then
a micrometer wasn't used on the valve travel.  You should check this
now and plan to rebuild or at least re-regulate at this time.

Doug L. Bullock
http://thepianoworld.com/ 


(Message sent Fri 5 Dec 2014, 08:40:24 GMT, from time zone GMT-0600.)

Key Words in Subject:  88-note, Duo-Art, Playing, Rolls

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