Complex sentence: Cinemascope 55 was originally intended to have a six-track stereo soundtrack, and the premiere engagement of "Carousel" in New York did use one, recorded on magnetic film interlocked with the visual image as with Cinerama.
Split into simpler sentences: Cinemascope 55 was originally intended to have a six-track stereo soundtrack. The premiere engagement of "Carousel" in New York did use one, recorded on magnetic film interlocked with the visual image, as with Cinerama.