“Subotnick” is the name of a Caribou song, but it is also Morton’s last name, the ninety-year-old composer and pioneer of electronic music best known for the album Silver Apples of the Moon (1967), which continues to be discovered by new generations decades later. Between old records, which explore his extensive career, and conversations in the first (and third) person, we meet a man guided by instinct (and by his arm).