For something a little more light-hearted:
“Making a Beatles record…requires more than the presence of individual Beatles voices; it requires the potential for at least three-part harmony; it requires Paul’s bass and piano style; it requires George’s lead-guitar style, it requires unusual guitar harmony between George, John and Paul and the peculiar drumming style of Ringo; it requires John tempered by Paul, and Paul darkened by John; all of them spiritualized by George; all of them lightened up by Ringo; all of the excited by Paul; all of them made wary by John.” Michael Boyce, letter to the editor. The Believer Magazine, October 09.
But not too light-hearted. Here we have a new (new? new to me) method to study music. In any case, it is well written and beyond my abilities to either confirm or deny.