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Marvin Theobald
Larry’s organ project is a masterful accomplishment obviously done with a combination of extreme skill, knowledge and love. Having made some effort in the past year to restore a 1933 player piano, I have a huge appreciation for the effort involved in building such an amazing instrument and will readily add another WOW.
The player piano has many of the same controls involved in Larry’s organ. I have not had the willingness or the patience to go to the extremes Larry has to be successful. With the electronic micro-controller and MIDI programs Larry referred to the organ can play itself. Whether Larry can play himself or not he can still enjoy the full impact of its performance.
Below are a few photos of my player piano that will sadly likely never play again. Unfortunately it needs too much time and money investment to be worthwhile to me. It is available if anyone wants to tackle it. The photos show the condition I found it and some of the stages of disassembly during the restoration effort. This is more detail than you may care about but to anyone that has never been exposed to how these things work you may find it interesting to see.
Player piano as found.

With outer covers removed. Note missing key covers and dirt.


The following photos demonstrate the complexity of the operational mechanics.
Air motor that drives and rewinds the paper piano roll.

Partial view of vacuum line tubing and tracking bar for paper piano roll.

Key actuator bellows. There are over 100 individual actuator bellows in a player piano. Most bellows and valves found in vintage pianos and organs are replaced with electrically controlled valve assemblies in electrically converted digitally controlled systems.

Actuator valves exposed in open windchest.

Other layers of actuator valves and air passages in open windchest.
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After cleanup with open windchest. Note new key covers. Manual play is fully functional but the vaccum system that causes the player part to operate has too many air leaks and needs a complete rebuild.

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