Hypnagogic pop is pop or psychedelic music that explores elements of cultural memory and nostalgia by evoking the popular entertainment of the past (principally the 1980s and early 1990s) in a manner similar to the psychedelic pop of the 1960s. 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, lite rock, video game music, synth-pop, and R&B. Recordings are typically marked by echo, delay, sound degradation, and the use of analog equipment. Hypnagogic pop led to vaporwave, with which it is sometimes conflated.