DD073445 is a sheet of Delia's score fragments on an undated envelope addressed to Miss D. Derbyshire, Radiophonic Workshop, Maida Vale.
On the left half of the page are several rhythm patterns in 6/8 3/4 5/4 4/4 and 12/8, of which phrase (3), in 5/4, looks like the rhythm loop of Pot Au Feu that is played on two tones of a split wooden bell.
On the right is a paragraph of her plans for the piece and eight bars of manuscript for a melody in 3/4.
those int. notes in Avatin [?] :- wave oscillators. In 8ve pairs (in 2xf12[?]) heavy bass cut. through RP2. +7½ ips f/b. Speeded up w. ??? once. Additional f/b. With this method, only par??? to do strictly onsecutive notes. f ti w/c mod. [?] to get more elaborate single line. wide range diatonic, whole tone etc. scales got by calculating diff. rez.[?] speeds - to join tone semitone patterns. "Instant".