PT Journal AU Hanousek, R SO ArteActa PY 2022 BP 48 EP 78 VL 5 IS 2 DI 10.62804/aa.2022.013 DE audio installation; noise; conceptual score; extended performance techniques; improvisation; organ sounds; sound art; sound composition AB The multimedia project Reakce K represents the symbolic return of the organ moved under unclear circumstances in the 1950s from the closed prison chapel of the Brno Penitentiary to the new church building in Usobrno. Music composer, organist, and improviser Peter Graham has created extensive musical material through free improvisation and various playing techniques, which has been sorted and processed. A corresponding imitation sound bank of selected acoustic instruments was created for this sound material. The project took place in several phases, with each phase having a different output and solving different theoretical questions. The original sound material was incorporated into a multi-channel sound installation, into a composition mixing installation and acoustic music ensemble, and finally into a studio sound composition for radio broadcasting. The text describes working with tones and noises as important compositional elements, relationships, and transitions between composition and improvisation, connections between concert and sound installation, and the transfer of site-specific music into a fixed form of radio composition. ER