Alexander Guy Cook is an English music producer and the head of the UK record label PC Music. Cook released his first solo singles in 2014. He has also collaborated with PC Music artists such as Hannah Diamond, GFOTY, EASYFUN, Danny L Harle and felicita. He formed the one-off project QT with musician Sophie and performance artist Hayden Dunham, producing the 2014 single "Hey QT".

PC Music is a record label and art collective based in London and run by producer A. G. Cook. It was founded in 2013, uploading its first releases to SoundCloud that year. Artists on its roster have included Hannah Diamond, GFOTY, Danny L Harle, EASYFUN, Namasenda, and Planet 1999. The label's releases have been showcased on the compilations PC Music Volume 1 (2015), Volume 2 (2016), and Volume 3 (2022). Following a decade-long run, since 2024 the label is now only dedicated to archival projects and special reissues.