Hi there. I'm planning my teaching of the A level set works for the coming year and just can't get my head around the structure in Cage's Sonatas! Can anyone please explain it to me (in stupid terms)? It is going from points two and three below that I'm having a mental block: o The length of each part relates to the number 7 o The basic unit of 7 is proportioned as follows:1¼ ¾ 1¼ ¾ 1½ 1½ o These proportions are initially seen in crotchet beats: 4 1 3; 4 1 3; 4 2; 4 2. . Many thanks in advance.