I will have to check this out after I upgrade my sub! Hopefully it will be able to reproduce those 16 foot pipes.
FYI, I was born there and have visited St Stephen's a few times. My grandfather and father were both master organ builders when my father decided to emigrate to Canada. If we had stayed in Austria I likely wood have followed their foot steps. I love music and working with my hands and organ building covers so many different abilities: design, wood working, metal work, electrical. My grandfather even worked on the pipe organ in Vienna's famed music hall (Musikverein) and built a small day use organ for the Votive Church because the original became too delicate for regular use.
My one regret visiting Passau, Germany, was missing a concert at the church. Passau has one of the largest pipe organs in Germany and we were there for only two days as part of a bicycle tour along the Danube that started in Passau. By pure coincidence they had an organ concert that night, but the tour guide was late and I could not make it in time. We got there late only to hear the beautiful tones from outside. Don't know if I will ever get that opportunity again. ;_;