I am just starting to learn the music for Leigh Harline's song : "When You Wish Upon A Star" In measure 5 the LH notes are C, D, and E and the RH notes are G♭, A♭, B♭ and C. The beginning key for this song is C major. Is there a proper name for this cluster chord ?
The intro to this song plays the notes of a whole tone scale. The whole tone scale is used as a kind of cliché in theatre and film to represent imagination or dreaming/daydreaming. For example,
Interestingly, the whole tone scale's modes are all also whole tone scales, so a cluster played in that way may not have any distinguishable root note unless the performer or context emphasizes or suggests a certain note to be the root. I suppose you could also conceptualize it as an augmented seventh chord with an added 2 and #4, if any note seems to be the root.