petri-cycle · techno · Crimson Colimit · seed 7

A 285-second walk through the petri-cycle Petri-net arrangement metamodel, applied to bars sliced from the canonical techno · Crimson Colimit envelope (farm seed 1781088851449349214, 128.0 BPM).

Metamodel

Sections of a track are places of a Petri net. Section-to-section moves are transitions with stochastic weights. Inhibitor arcs cap revisits (no second BRIDGE; CHORUS revisited up to three times). The seed parameterises the RNG used to choose enabled transitions at each step — same net + different seed = different walk = a structurally different arrangement.

Walk (seed = 7)

INTRO(8) → VERSE(8) → PRECHORUS(4) → CHORUS(16) → BREAKDOWN(8) → CHORUS(16) → BRIDGE(8) → CHORUS(16) → VERSE(8) → PRECHORUS(4) → CHORUS(16) → BREAKDOWN(8) → CHORUS(16) → OUTRO(8)

Transition log

Source material

The canonical envelope contains one bar of pattern per instrument as a Petri net; the farm renderer loops it in "extended" mode with auto-DJ off. That gives uniform source bars — so the metamodel is responsible for all dynamic structure (filter sweeps, sidechain pump, gated reverb, fade-in/out) via the per-section FX chains in phrases.py.

Instruments in the source: