1. July 2013 - Hangblog article comment about Rohner/Manette 1995

On the Hangblog it says that Felix Rohner 1995 „discussed in Cancun with steelpantuner Elli Mannette whether the fourth mode of vibration of a sound field could be controlled“.

Article published on 1.7.2013
http://www.hangblog.org/20-jahre-panart-personliche-eindrucke-der-jubilaumsfeier/