This work by Morton Subotnick is the first musical composition released exclusively on CD-ROM. All My Hummingbirds Have Alibis was based on a picture collage book by Max Ernst, and released in 1991. In this piece, the computer listens and reacts to the MIDI-controlled piano and mallet instruments. The music contains trite sampled text, and sounds much more mechanical due to the prevalence of computer-generated music. All My Hummingbirds is interactive, allowing the user to start and stop the music at any point, follow the score, view sections from Max Ernst's book, view a written narrative, read program notes and biographies, etc.