Interference — where combined patterns yield features present in neither — may lie at the heart of algorithmic music

Magnusson and McLean argue that interference — where constituent patterns combine to form a new pattern with features not present in the originals — may lie at the very heart of algorithmic music. The analogy is weaving: colour sequences in warp and weft threads, combined with the weave structure, produce surprising images neither thread sequence contains alone. In live coding, interference emerges when polymorphic pattern functions are combined: reversal plus phase offset plus polymetry yields rhythmic textures that could not be planned analytically. This reframes live coding from composing instructions to cultivating conditions for emergence, and the authors note interference can be found in ixi lang and SuperCollider too, not only Tidal.

Examples

Tidal’s weave creates spatial/rhythmic interference between a pan phase and several patterns; stacking a 3-step against a 4-step pattern in one cycle creates polymetric interference; Reich’s phasing is interference between two identical patterns at different speeds.

Assessment

Define interference in pattern-based music and give one concrete TidalCycles example where two patterns combine to produce a third with features neither original contains.