Etude op. 45a On the Circling Motion in Quarter-Tone System 练习曲 谱表 双钢琴

这首乐曲所遵循的原则与《Etude sur le Carré magique sonore》（BEL 174）相似。8 个音程循环紧紧相随，形成了一种移动的八角形，先是竖起，然后拆除。减五度音程的循环在走过 13 个八度音程后才结束，即超出了实际可听的范围。这种循环运动在开头和结尾处最为明显，车轮逐渐停了下来。在这两者之间，还夹杂着密集音群和和弦颤音的段落（戈特弗里德-埃伯勒）"

作曲家: Wyschnegradsky, Ivan
编者: L'Association Wyschnegradsky, Paris
乐器: 2 pianos, 8 hands
出版社: M.P. Belaieff Musikverlag
原文简介:
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)