What is action regulation? Regulation is the adjustment of the
mechanical aspects of the pianos to compensate for the effects
of wear, the compacting and settling of cloth, felt, and
buckskin, as well as dimensional changes in wood and wool parts
due to changes in humidity. The three systems involved in
regulation are the action trapwork and damper system. The action
is the mechanical part of the piano that transfers the motion of
the fingers on the keys to the hammers that strike the strings.
It is comprised of over 9,000 parts which require adjustment to
critical tolerances to be able to respond to a pianist's every
command. The trapwork is the assemblage of levers, dowels and
springs that connects the pedals to the action affecting sustain
and dynamics. The damper system is the mechanical part of the
piano that stops the vibration of the string when you release
the key and is controlled by the key and pedal systems. If I
have my piano tuned regularly, why do I need to have it
regulated? While tuning correc