-- non-subscriber, please reply to sender and MMD --

Can anyone help me find some graphic or tabular representation of
the effect of heat and humidity on pitch as it relates to pipe organ
tuning?

Charles D. Lightfoote
Parsons Pipe Organ Builders
Canandaigua, New York

 [ This is also a concern of fair organ owners who must tune the
 [ organ when the air is cool and damp (e.g., on the night before
 [ a performance during a warm day).  The reed pipes don't change
 [ pitch as the temperature rises during the day, but the pitch of
 [ the flue pipes rises a lot!  So a tuning pitch correction must
 [ be applied if the organ will perform under different temperature
 [ and humidity conditions (air density) than when it was tuned.
 [ -- Robbie