Scent of Mystery

Scent of Mystery is a 1960 mystery film that featured the one and only use of SmellOVision, a system that timed odors to points in the films plot. It was the first film in which aromas were integral to the story, providing important details to the audience. It was produced by Mike Todd, Jr., who in conjunction with his father Mike Todd had produced such spectacles as This is Cinerama and Around the World in Eighty Days.

The screenplay was adapted from the 1947 novel Ghost of a Chance by Kelley Roos, the pen name of husband and wife mystery writers Audrey Kelley and William Roos. The novel was set in locations in New York City. Kelley Roos also wrote a 1959 paperback novelization of the screenplay, reset in Spain.The soundtrack was recently rereleased on CD. It features the score composed by Mario Nascimbene and two songs from the film sung by Eddie Fisher. ........

Source: Wikipedia