Okay, they’re not Hitchcock’s. He didn’t compose them. They’re Bernard Herrmann’s. Specifically, this collection includes the soundtracks to The Wrong Man, Vertigo, and North by Northwest. Herrmann scored a lot of Hitchcock films, especially his big, splashy Universal ones. Popular films whose Herrmann soundtracks are not included herein are Psycho, Marnie (perhaps not as popular a film, but a beautiful soundtrack), and The Man Who Knew Too Much (the 1956 release, with Jimmy Stewart and Doris Day.) He even served as sound designer on Hitch’s music-free film The Birds.
I first discovered Herrmann, like a lot of fans my age, because his music from The Day The Earth Stood Still and Beneath the Twelve-Mile Reef, was prominently featured in Lost in Space. Herrmann did a lot of TV, a lot of it original, particularly for The Twilight Zone. I guess my next encounter with him was his moody score for The Ghost and Mrs. Muir, with Rex Harrison and Gene Tierney. That was one of the first CDs I ever bought, when CDs became popular. (The cassette era, in which I came of age, wasn’t especially kind to soundtrack-lovers. They were pretty much released largely on vinyl and then jumped to CD. There are exceptions.