[3] He founded PC Music in August 2013, a now-defunct record label that specialized in retro-styled instrumentation; its signees included Hannah Diamond, GFOTY, Finn Keane (as Thy Slaughter), Danny L Harle and Felicita.

[4] This style of exaggerated pop tropes grew to serve as the foundation of the hyperpop genre, which Cook is credited for developing and popularising.

[2] The two bonded over their shared musical tastes for artists including Captain Beefheart and Archie Shepp, as well as interest in comedy duo Tim & Eric.

[10] One of their earlier works was a collection of compositions for the Disklavier, released with Spencer Noble and Tim Phillips under the name "Dux Consort".

[1] They contributed to the score for Alicia Norman's animated film Heart of Death and began considering a children's television show titled Dux Content's Jungle Jam.

Cook and Harle explored how to build rhythms out of a vocalist's natural singing tempo and released the results as "Dux Kidz".

[14][15] Fact magazine called it PC Music's "de-facto anthem", and the song received a remix from Scottish producer Rustie.

[16] Cook worked with Sophie to produce a song for QT, a pop singer portrayed by American performance artist Hayden Dunham.

[21][22] After discussing a collaboration on a Charli XCX album,[23] Cook contributed an official remix of her single "Doing It" featuring Rita Ora.

[14] March 2015 saw Cook's PC Music head to the US to showcase all 11 of his label's talent at the Empire Garage in Austin, Texas as part of SXSW.

The showcase received positive reviews, with The Guardian stating that his "entire thundering set [shows] this is a label refusing to be confined by definitions of genre or good taste.

[29] In January 2016, Chinese singer Li Yuchun, also known as Chris Lee, released a single consisting of songs "Real Love" and "Only You", both of which were produced by Cook.

[30] That April, experimental music producer Oneohtrix Point Never posted a cryptic video to his Instagram that appeared to show Cook working on a remix of "Sticky Drama", a single from his 2015 album Garden of Delete.

[35] On the day of its release, Cook revealed via Twitter that "Superstar" had been in the works for over two years prior, originally beginning as a "topline pitch" for electro house DJ Zedd.

"[45] On 6 April 2020, Cook and BJ Burton were announced as co-executive producers for Charli XCX's quarantine album how i'm feeling now, which was written in an open-source style, sharing the production process online and utilizing fan input and content.

[48] On 30 July 2020, Cook announced an upcoming studio album 7G,[49] and held a virtual concert over Zoom featuring Caroline Polachek, GRRL and Thy Slaughter titled 7 by 7 on 7 August.

[53] Leading up to its release, Cook hosted another free livestream festival across Zoom, Bandcamp and Twitch entitled 'Appleville', featuring performers including 100 gecs, Alaska Reid, Charli XCX, Clairo, Dorian Electra, Hannah Diamond, Kero Kero Bonito, Namasenda and Oklou.

[citation needed] In December 2020, Cook took part in LuckyMe Records' 12 Alternative Futures Advent Calendar Project.

[59] On 9 March, he released a cover of The Smashing Pumpkins' song "Today", announcing his SoundCloud-exclusive album Dream Logic, featuring reworks of 7G and Apple tracks as well as collaborations with and remixes of Charli XCX, Oneohtrix Point Never, The 1975, Jónsi, No Rome,[60] Oklou, Alex Somers, and Alaska Reid.

[8] Cook lent additional production to "Lick the light out", featuring Madonna, on Christine and the Queens' Paranoïa, Angels, True Love.

[71] Cook also contributed to the score of 2023 film Bottoms, and produced "How to Stay With You" from Troye Sivan's Something to Give Each Other album.

[80] Britpop was released on 10 May 2024 under Cook's newly set up record label New Alias,[79] consisting of 24 songs which were split into three discs representing the past, present and future respectively.

[81] Cook was a significant producer on the Charli XCX album Brat, working on singles "Von Dutch",[82] "Club Classics", and "B2B".

[80] He further produced "Hello Goodbye" and "Spring Breakers" on the deluxe version, Brat and It’s the Same but There’s Three More Songs So It’s Not, sampling Britney Spears' "Everytime" in the production of the latter.

[2] Cook references Scritti Politti's album Cupid & Psyche 85 for its "conscious decision to take pop music and make it as shiny and detailed as possible".

He experiments with combining dissonant sounds, and the resulting dense, multi-layered arrangements are influenced by the Black MIDI techniques.

'[100] In more recent years it has been noted for its influence on mainstream pop due to the production work by PC Music signees for artists such as Kim Petras, Charli XCX and Jónsi.