The second part of the collaboration that started in 2013 with the (now deleted) "De Aeris in Sublunaria Influxu" CD, released 2015. On this new album, RAISON D'ETRE source material was used, processed and mixed with additional recordings by TROUM (guitars, voices, flutes, accordeon, cello, violin, didgeridoo, dombra, tapes, found sounds). Based on a notion of the fascinating Amazonian Piraha tribe, this is an excursion into nine different micro-worlds of perception and consciousness. Music that reaches for the eternal, but it only exists in the very moment.