OttOrgan lets you play the Ott-Orgel sample set of Christian Datzko on a MIDI keyboard and a MIDI pedal attached to your iOS or macOS device. The Ott organ is a house organ with five ranks at one manual and an attached pedal with a 16' subbass. If you would like to use the sample set with other software, you can get it at http://orgel.datzko.ch/main.EN.html.
For more information, please consult the app support page http://polaron.de/OttOrgan/ , the Napo documentation at http://polaron.de/Napo/ and in particular the Napo user manual at http://polaron.de/Napo/manual .
For hearing sound examples of the app, please visit the support page http://polaron.de/OttOrgan/ .
