Editing Pipe organ (section)

===Tuning and regulation===
{{main|Pipe organ tuning}}
[[File:Cradley Heath Baptist Church Organ A03.JPG|thumb|upright|right|Tracker action showing adjusters on tracker ends which engage with the keys of the great organ]]

The goal of tuning a pipe organ is to adjust the pitch of each pipe so that they all sound in tune with each other. How the pitch of each pipe is adjusted depends on the type and construction of that pipe.

Regulation adjusts the action so that all pipes sound correctly.  If the regulation is wrongly set, the keys may be at different heights, some pipes may sound when the keys are not pressed (a "cipher"), or pipes may not sound when a key is pressed.  Tracker action, for example in the organ of [[Cradley Heath Baptist Church]], includes adjustment nuts on the wire ends of the wooden trackers, which have the effect of changing the effective length of each tracker.