The Ott-Organ is a beautiful rehearsal instrument, which was first published in 2004 by Christian Datzko. This tracker organ was built by Dieter Ott (Göttingen in Northern Germany) in 2003. It has initially 5 Stops on one manual (56 keys). The manual is always coupled to the pedal (30 keys). The original stops are Gedackt 8′, Rohrflöte 4′, Prinzipal 2′, Quinte 1 1/3′ and Oktave 1′.

The extension adds the following features:

  • A 16′ pedal stop (Gedackt 16′)
  • Stop action, key action, and blower noises (adjustable)
  • Addition of dual portrait and landscape jambs (with French stop names, graphics artist: Stéphane Royer)