The Sakralen Interaktionen [sacred interactions] are a spatial work. Four wind instruments are positioned in different sacred rooms – a church, a mosque, a Hindu house of prayer and a Buddhist temple. They are pre-recorded and then unite in the concert hall through loudspeakers, the original sounds being electronically transformed and complemented by synthetic instruments. Additionally, the spiritual leaders of the houses of prayer get a chance to speak in movements IV and V. Moreover, in the piece, sounds move through space, in simulation and in reality: the acoustic instruments assume other positions with every new movement, while the synthetic sounds are also realigned and moved. Additionally, the loudspeakers themselves are carried around the concert space, they are swung or acoustically filtered. The instrumentalists barely play in the concert hall – they tread, lift, put as well as complement the speeches by means of rhythmic clapping. Only in the final movement VIII, they play as usual – in unison with the recorded instrumental passages.