How can chance and improvisation be used in live electronic music?

In the context of live electronic music, chance and improvisation are often integrated through aleatory music, a practice where the performer is granted the freedom to determine the order or manner in which musical materials are presented.1

Rather than relying on a fixed, pre-recorded sequence, this approach allows for spontaneous creative choices. Some experimental compositions utilize "building blocks" of musical phrases or sections, which performers may combine at random during a performance. This process shifts the role of the performer from a mere interpreter of a static score to a collaborator who actively shapes the work's structure in real time.2

While early electronic music was often defined by fixed tape or disc recordings that discarded the need for a performer, the incorporation of aleatory techniques reintroduces the human element. By using verbal instructions, graphic codes, or idiosyncratic systems instead of traditional notation, composers provide a framework that remains open to the performer's immediate, extemporaneous decisions, ensuring that each live performance remains unique.12