Chillwave is a music microgenre that emerged in the late 2000s. It is characterized by evoking the popular music of the late 1970s and early 1980s while engaging with notions of memory and nostalgia. Common features include a faded or dreamy retro pop sound, escapist lyrics, psychedelic or lo-fi aesthetics, mellow vocals, slow-to-moderate tempos, effects processing, and vintage synthesizers.

Hypnagogic pop is pop or psychedelic music that evokes cultural memory and nostalgia for the popular entertainment of the past. It emerged in the mid to late 2000s as American lo-fi and noise musicians began adopting retro aesthetics remembered from their childhood, such as radio rock, new wave pop, light rock, video game music, synth-pop, and R&B. Recordings circulated on cassette or Internet blogs and were typically marked by the use of outmoded analog equipment and DIY experimentation.