The music of Heuristics Inc. -- the alter-ego of Baltimore's Bill Maciejewski -- includes instrumentals, vocal songs, improvisations and remix work. Missing Architecture is a collection of his improvisational work, which is entirely electronic in nature.

These ten tracks are improvised in much the same way that enemies in Nintendo games are random -- that is, once you figure out the pattern, it's entirely predictable. The Heuristics Inc. model involves layering looped sounds generated by analog and digital synthesizers while maintaining a steady beat. Although there's often an extreme differentiation in pattern duration or pitch variation, tracks like "A Widened Chasm In Her Heartbeat" and "Mesozoic Messianistic" eventually permit their layers to phase together, bringing a clarity that isn't typically associated with improvised music.

Describing Missing Architecture as ambient electronica seems superfluous -- what else could it be, aside from unlistenable industrial garbage? -- but surprises occur in songs like "Moonmine" and "Seville Suit", where the electronic artifacts begin to sound like 8-bit MIDI and you could swear that the random enemies from your favorite console games are bearing down upon you. Similarly, the trance-inducing closer "Organ Loaner" will leave you with a clean palate after the aural equivalent of a four-course meal. Fortunately, Heuristics Inc. recognizes that the practical simplicity of such moments bears repeating.