***Original and new realizations of five of Polish Radio Experimental Studio’s seven published scores. Pieces by Andrzej Dobrowolski (Music for Magnetic Tape and Piano Solo; Music for Magnetic Tape No.1), Bogusław Schaeffer (Symphony: Electronic Music), Włodzimierz Kotonski (Aela; Study for One Cymbal Stroke), and Krzysztof Penderecki (Psalmus) “performed” by Eugeniusz Rudnik and Bohdan Mazurek and by Lionel Marchetti, Thomas Lehn, Philip Zoubek and Wolfram, Arszyn and Piotr Kurek, Marion Wörle and Małe Instrumenty. The scores are among the first attempts to write down electronic sounds, and provide links between music and graphics, making explicit the replacement of utilitarian functions for experimental ones. Precision of communication between a composer and a sound engineer — noticeable in early Dobrowolski scores or in Kotonski’s Study — yields to a tendency to experiment with this communication. In 1964 Bogusław Schaeffer’s graphic score was full of new symbols, well-defined by the author but which above all serve as tools of identifying the potential actions of the sound engineer. Six years later Włodzimierz Kotonski’s composition, deprived of graphic symbols, is a nineteen-page text-score describing the most important principles of a family of electronic pieces called Aela. The PRES Scores album is dedicated to the ambivalence of conservatism and experiment. Scores on paper are what the composer leaves behind and in this way requires, or at least allows, subsequent realizations. Twenty-eight-page booklet.