Back in 1946 the jazz dance performer R. Pryor Dodge wrote in the music magazine ‘The Record Changer’ the following: “The essential element in jazz … the melodic line … [has] … an existence and development of it’s own quite apart from the tone or texture qualities … enthusiasts are attracted to jazz for various reasons. Some are highly sensitive to intonation, others to rhythm and playing style. I believe the greatest musical significance is to be found in the musical line.”
As for “… the aesthetic (melodic line) and the sensuous (tone) in music let us investigate which of these aspects we like most in jazz …. [T]he sensuous quality can exist by itself … however, the sensuous is never isolated as we always have some tune, however simple and short, to carry it along. [W]hen thinking of the aesthetic or melodic line we always have whatever sensuousness an instrument has itself …. Our musical appetite is quickly appeased at any one hearing [by sensuousness]… pleasure is static because we have no … expectancy … no leading into something else.“
”The aesthetic of a composition, when we become familiar with it, takes on a shape that unfolds … the fulfillment of anticipation … gives us our greatest delight. To be held in that position for some time makes for an engrossing experience … [t]he longer we are held the more memorable the experienc…. In jazz the motor action of the strong beat and rhythmic suspension is physically so exhilarating that when combined with the tone quality a minimum of aesthetic [melodic line] is needed.“
Pryor Dodge in that same year (1946) also discussed jazz improvisation in the English music magazine ‘Jazz Forum’ writing: “To take content from a tune and still not explicitly state the tune in any part of it’s variation the improviser must have the tune safely buried in a substratum of consciousness … the improviser can sustain two voices running through his head. It is not counterpoint … [it’s] … a situation where the theme, matrix to the variation, is playing the part of the inner voice, the audible version being the newly created variation.… [t]he true improviser is not merely releasing a perfect obbligato for the tune in his head … he is creating a new derivation which will be heard alone, will have to stand by itself…’’
” It is the comprehension of the place of harmony plus the maintenance of the intact unity of the tune that distinguishes a great improviser... the [weak device] of circling around a succession of tuneful single notes with runs and rhythms does not vary the tune. [A] simple[r] way of improvisation consist in forgetting the tune and improvising on the harmony as carried in the head or sustained by the orchestra … but lack of a cementing continuity of melodic thought keeps such improvisations from holding together. Unless the improviser can, on the moment, create a new unity of tune we get much choppy activity - and little musical material.”
EDIT: pardon this comment‘s text shifting to italics; it is unintentional and just an artifact of no significance.