He gives a formula for the mode shape in terms of " spherical solid harmonics " and " spherical surface harmonics, " which he uses and discusses in a way that doesn't seem to match Wikipedia's description of spherical harmonics.
2.
Walter Everett argues that, " despite the unusual surface harmonic progressions, " in The Beatles'" Strawberry Fields Forever " ( 1967 ), " the structural basis of the song is I VI IV V I . " The chorus of The Beatles'" Happiness Is a Warm Gun " is an example of the fifties progression . " Unchained Melody " also uses the progression.