First Man (Original Motion Picture Soundtrack) is the soundtrack album to the 2018 film First Man, directed by Damien Chazelle. The musical score was composed by Chazelle's usual collaborator and Harvard University classmate, Justin Hurwitz. The score uses electronic, orchestral and vintage sounds.^[1] In addition to a 94-piece orchestra, an electronic theremin, a moog synthesiser and several other instruments were used, fused with vintage sound-altering machines during the audio mix. The soundtrack released by Back Lot Music on October 12, 2018, received positive reviews from critics, who praised it for its balance of softer melodic passages and powerful themes.^[2][3] Hurwitz's score received several awards and nominations, including the Golden Globe Award for Best Original Score.

The score was performed by a 94-piece orchestra at Sony Scoring Stage in California, with instruments such as the electronic theremin and Moog synthesizer, as well as vintage sound-altering machines including Leslie speakers and an Echoplex.^[4][5]

Based primarily on the script from Josh Singer, Hurwitz began creating piano demos before principal photography began until he and Chazelle decided on one that would become the main theme. "It had to have a sense of loneliness but also beauty. Like when he gets to the moon – you're on this barren surface; it's all very beautiful, but it's very, very lonely." Chazelle liked the theremin's association with low-budget sci-fi pictures of the '50s and early '60s, as according to him, "Armstrong and his NASA colleagues were, in their race to the Moon, basically doing real-life science fiction". He further added, "Those were the sounds and images we had in our minds of the moon, and space in general. At its heart, this was a story about grief, about someone who lost a lot of people he loved, and what those losses did to him. There was something about the theremin that seemed to convey that grief that spanned across the cosmos. It obviously makes you think of space, but it also has those qualities of the human voice – a sort of wailing – that could feel very mournful to me."^[4]

Hurwitz acquired a theremin and learned how to play it, and his performances are in the final score, as he wanted to "sound electronic, but not harsh or abrasive" and tried to make it, in most places, mildly to blend with the orchestral music.^[4][6] He further added an American Moog and a British EMS VCS 3 synthesiser model, as they sounded "futuristic" during the late-1960s. In addition to this, Hurwitz predominantly made use of harp in the score for the "intimate moments".^[7] Other instruments such as violins, violas, cellos, basses, brass, strings, woodwinds and percussion instruments were used in the conclusion of the film, particularly brass being used only after the sequences following Apollo 11 mission.^[8][5] Saying in an interview, to Collider: "we had developed that palette early on with those electronic sounds and we wanted to feather in very lightly bits of some vintage synths and some of the sounds and ambiences that we had designed. We wanted to layer in very, very light touches here and there, just to kind of create an atmosphere in a lot of those scenes. It wasn't about articulating melody as much as it was just like creating a little bit of atmosphere to get you to feel something."^[8] During the final mixing process, Hurwitz designed the score with analogue rotor cabinets, and then being synthesised with analog instruments.^[7][8]

Leon Bridges appears in the film as Gil Scott-Heron, reciting the Scott-Heron spoken-word poem "Whitey on the Moon". Chazelle felt it was important to underscore that one of the challenges at the time was the push back of citizens who did not agree with the expense, and the risk, of the space program.^[9] On October 4, 2018, Entertainment Weekly reported that two themes from the film's score soundtrack, were released as preview tracks, before the soundtrack's release through Back Lot Music on October 12.^[10]