a muezzin with the bells of a carillon and the tone of a Shofar. The concerts planned for Whitsun 2015 on the Carillon in Berlin's Tiergarten were cancelled after the carillonist refused to perform the piece, which had been commissioned for this occasion. Marcoll said in interviews that the reason why he wrote the piece would now become the reason why it would not be performed. Up to this day "Adhan" was performed exclusively in a special indoor version for a church in Berlin-Schöneberg. Amproprifications Since 2016, Marcoll has been working on a series of works called "Amproprifications" (a portmanteau composed of appropriation and amplification) in which existing works by other composers are modulated by volume changes in real time. "In short, all Amproprifications are elaborate amplification layers for preexisting pieces by other composers. The parts of the performers consist in the performance of scores by other composers. One specific score is performed for each piece in the series. Not a single note of the original's text is being altered, nothing is added, nothing is omitted, nothing is being changed in any way. The electronics on the other hand solely consist of amplification. No additional sound whatsoever is being produced. The possibilities of interference span a large variety of movements, from almost inaudibly slow fadings to extremely fast and brutal chopping. In a figure of speech, all Amproprifications are "silent" pieces. They themselves do not contain or produce any sound. They do, however, constitute filters, readings, processings of the original pieces. The development of the amplification layers are very different each time and stem from aspects regarding structure and content that are based in the respective original: The originals are being superimposed with external layers which have their origin in the works itself." In addition to the acoustic versions, the amproprifications are also available in the form of visualizations. Marcoll transforms the amplification levels into two-dimensional graphics, which are also shown in exhibitions. Selected works Solo Amproprification #5: Goldrausch, Mark Lorenz Kysela, 2017, 40' (soprano saxophone and electronics) Amproprification #2: Ombra, Franco Donatori, 2016, 13' (contrabass clarinet and electronics) Amproprification #4: Splitting 8.1, Michael Maierhof, 2016, 15' (saxophone and electronics) Amproprification #1: Sequenza 9c, Luciano Berio, 2016, 14' (bass clarinet and electronics) Adhan, 2015, 9' (carillon and tape) Compoand No.6: VOICE ALARM AIR MACHINE, 2012, 14' (flute and electronics) Compoand No.5: CONSTRUCTION ADJUSTMENT, 2011, 14' (percussion and electronics) Compoand No.1a: