"overtone organ" for james tenny pieces with harmonium

For the performance from James Tenney's pieces, a overtone generating instrument has been needed. For this purpose the overtone hearing training patch has been enhanced as the "overtone organ" (german "Obertonorgel") was developed and successful played for the piece "In a large, open space (1994)" by James Tenney, based on the overtones of the double base F for 14 musicians.