Yes, Forbidden Planet - that is a brilliant score of complete originality from one of the most stiflingly conventional times in the history of movies - the 50s. All of the sounds were from unique circuits created specifically for the composition.
I agree completely on Herrmann's use of the 7th - it is almost an obsession in itself. Though Vertigo used a lot of augmented triads and bitonality, the ethereal use of major 7s is one of his hallmarks, not to mention the more disturbed major 7 with a minor triad - as in Vertigo and Hangover Square - and the famous minor 7 3-note motif from Psycho that he quoted at the end of Taxi Driver.
I agree completely on Herrmann's use of the 7th - it is almost an obsession in itself. Though Vertigo used a lot of augmented triads and bitonality, the ethereal use of major 7s is one of his hallmarks, not to mention the more disturbed major 7 with a minor triad - as in Vertigo and Hangover Square - and the famous minor 7 3-note motif from Psycho that he quoted at the end of Taxi Driver.