Essay which covers KLUTE's Soundtrack

 https://celluloidwickerman.com/2014/05/29/the-female-voice-in-subversive-soundtracks-of-the-counter-culture-era/
“The female voice on the soundtrack occupies two forms of thematic development. The first is the re-enforcing of Daniels’ role as a seductress with the voice being read as potentially pleasurable (almost in a cloying seduction of the viewer). The second is in the disturbing subversion of the reality of this underworld which consists of dangerous liaisons with disturbed characters, drug addiction, and murder. In spite of these two separate ideas, the music does not technically change, with the vocal presence presenting the same melody but over different visual and narrative contexts.”