The Ott-Organ is a beautiful tiny rehearsal instrument, which was published in 2004 by Christian Datzko. This tracker organ was built by Dieter Ott (Göttingen in Northern Germany) in 2003. It has originally 5 Stops on a single manual (56 keys). The manual is always coupled to the pedal (30 keys). 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)
This extensions works with Hauptwerk 4 and Hauptwerk V.