Psychedelic rock is a genre of music that emerged in the 1960s. It is characterized by a combination of psychedelic sounds and intricate instrumental arrangements. Synonyms for psychedelic rock include acid rock, trippy rock, and space rock. These subgenres emphasize the use of electronic effects, extended improvisation, and unconventional song structures to create an otherworldly sound. Additionally, there are variations of psychedelic rock like neo-psychedelia and psych-pop that incorporate elements of other genres such as indie, folk, and pop. Despite the differencing in these subgenres, the common threads of experimentation, individuality, and a certain level of mind-altering abstraction run through them.