Oh Hang, Hanghang am 1. interaktiven Obertonkonzert in der alten Kirche Witikon- Zürich. - Overtone Music Network2024-03-29T13:51:06Zhttps://www.overtone.cc/forum/topics/oh-hang-hanghang-am-1?groupUrl=hanghanghalo_newsgroup&%3Bamp%3Bfeed=yes&%3Bamp%3Bxn_auth=no&feed=yes&xn_auth=no