Mini Metro : The Underpinnings of a Musical Subway
summary
Design documents and prototypes show a procedurally driven soundtrack that maps game objects to musical language: lines get a pitch and rhythm, stations supply percussive shapes, trains act like simple sequencers and change timbre when carrying riders. Implementation uses Unity with a G‑Audio plugin after FMOD proved unwieldy, prioritizes subframe scheduling and a quantized pulse on audio thread so gameplay syncs to sound, and requires the audio engine to start the game. Iteration spans months of prototypes and city‑specific harmonic/rhythm presets and G-Audio integration with trains switch from noise to tonal when carrying passengers.
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chapters (10)
- 0:00Start
- 2:25Mini Metro
- 12:51Audio Prototyping
- 24:01Quantized System
- 24:50G Audio
- 28:03Perpetual Iteration
- 35:04Trains
- 35:19Engines
- 42:28Sine Waves
- 44:27Game Design
