Aiolos €'s

Two weights shift their weight within 12 hours through two infusion drops. The weights are the tuning base of two of the three notes. The third tone is tuned by the complete weight of the construction. The whole instrument is powered by two fans, which are playing a harmony based on three overtones.

http://www.felix-ermacora.de/files/gimgs/th-37_1_v2.jpg
http://www.felix-ermacora.de/files/gimgs/th-37_3.jpg
http://www.felix-ermacora.de/files/gimgs/th-37_2_v2.jpg