“In a DESCENDING OCTAVE, on the other hand, the greatest 'interval' occurs at the very beginning of the octave, immediately after the first do and the material for filling it is very often found either in do itself or in the lateral vibrations evoked by do. For this reason a DESCENDING OCTAVE develops much more easily than an ascending octave and in passing beyond si it reaches fa without hindrance; here an 'additional shock' is necessary, though considerably less strong than the first 'shock' between do and si. Fragments: Seven