DESCRIPTION:
Werkstatt_klangapparate 2: Thilges trautonium
Sound Performance with Nik Hummer and Gammon, 18/11/2006, Berlin

The tone of the instrument incur through the mixture
subharmonic oscillations, they are effectively four sounds from
Undertones. thilges realized this principle as the Installation
Oscillators and speakers. Thereby produce the tone you
based on a 4-fold-harmonic, ie by 4 four sounds. Unlike
than the Sala'schen Trautonium the mixtures do not arise within
the apparatus, but by multi-channel sound in the listening room. The
Determined spatial behavior of correlated sounds
the tone. The venue is part of the apparatus. In
Thilges explored part of their two-month project, the residence
sonic possibilities of the 4-fold sub-harmonics. In their
Performance
Record the spatial instrument in a mixture of
Composition and improvisation.

More info about Thilges 3 work:
http://www.gammon.at/thilges/