Mon Mar 13, 2017 4:07 am
A Ruispijp is not always a 2-rank mixture, see the Rotterdam sample set where the Pedal Ruispijp is a 5-rank mixture with a Cornet-like composition. Often a Ruispijp is a continuous mixture, with no (or very little) breaks.
On German-Romantic organs, you often don't have a separate Quint 2 2/3' and Octave 2', but a Rauschpfeife which combines both ranks.