The score was written by and co-produced by Carpenter and . Howarth used equipment including ARP and Prophet-5 synthesizers and a Linn LM-1 drum machine, as well as an acoustic piano and Fender guitars, to create the palette of sounds used in the score, while Carpenter composed the melodies on the synthesizer keyboards. As the MIDI standard had yet to be invented, Howarth manually synchronized the equipment to picture while listening to a copy of the film s dialogue. Initial inspirational directions which Carpenter shared with Howarth included albums by and .