Organnery retro-fits existing keyboards, pedals and stops to work with the open source classical organ modelling software Aeolus, created by Fons Adriaensen. Aeolus is a software synthesiser optimised for this task, with hundreds of potential controls for each stop that enable the organ builder to voice unique instruments. The best parts of an existing organ, such as the woodwork and the physical controls the organist is used to, can be retained and integrated into a new Organnery instrument. Alternatively, a complete instrument can be built from scratch using standard MIDI keyboards and pedals, for installation in a house of worship or for practice at home. Organists can use a touchscreen display to control the Aeolus software, or the system can be hidden inside the console so that only traditional stops and pistons are visible. Unlike a PC-based organ emulator or sampler, the Organnery hardware has no moving parts or cooling fans. The Organnery software is a customised Debian GNU/Linux image for ARM processors, including the Aeolus synthesiser and the programs it requires to run as a dedicated system. This software was prepared in partnership with Audiotronic by 64 Studio. The Raspberry Pi has been chosen as the initial CPU board for Organnery because of its great development community, affordable price and worldwide availability. Organnery can use any class-compliant USB sound card, and specialised I2S sound cards designed for the Raspberry Pi can also be used. A demonstration video is available at https://organnery.com and personal demonstrations are available on request at the Audiotronic workshop in Bordeaux. Pipe organ builders and MIDI hardware engineers who are interested in forming a network of certified Organnery technicians are invited to make contact with Raphaël Mouneyres <raphael(a)audiotronic.fr> or by phone +33 557 916 211. Audiotronic Rue des Terres Neuves Batiment 19 33130 Bègles France