Etude op. 45a On the Circling Motion in Quarter-Tone System 練習曲 譜表 雙鋼琴

這首樂曲所遵循的原則與《Etude sur le Carré magique sonore》（BEL 174）相似。8 個音程迴圈緊緊相隨，形成了一種移動的八角形，先是豎起，然後拆除。減五度音程的迴圈在走過 13 個八度音程後才結束，即超出了實際可聽的範圍。這種迴圈運動在開頭和結尾處最為明顯，車輪逐漸停了下來。在這兩者之間，還夾雜著密集音群和和絃顫音的段落（戈特弗裡德-埃伯勒）"

作曲家: Wyschnegradsky, Ivan
編者: L'Association Wyschnegradsky, Paris
樂器: 2 pianos, 8 hands
出版社: M.P. Belaieff Musikverlag
原文簡介:
This piece is governed by a principle similar to the one which obtains in the Etude sur le Carré magique sonore (BEL 174). 8 interval cycles follow one another in close proximity and form a kind of moving octagon which is first erected and then dismantled. The cycle of diminished fifths comes to a conclusion only after it has traversed 13 octaves, that is, beyond the confines of what is actually audible. The circling motion is most apparent at the beginning and at the end, where the wheel gradually grinds to a halt. In between there are passages with dense tone clusters and chordal trills.” (Gottfried Eberle)