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A police car with its siren on approaches a pedestrian. The siren pitch rises as it gets closer, then drops noticeably lower as it speeds away.

C2-3-08 Event Transition · source_radiation principle: Doppler Effect (Wave)
Seedance 2.0ByteDance · proprietary
Kling 3.0 OmniKuaishou · proprietary
Veo 3.1Google · proprietary
LTX-2.3Lightricks · open
Ovi 1.1character.ai · open
JavisDiT++JavisDiT · open
MagiHumanGAIR-NLP · open
Per-prompt rubric

Basic standards

Visual presence

  • a police car
  • a pedestrian
  • a road

Event: a police car passes a pedestrian

Audio presence

  • a police car siren

Sound: a siren

Key standards

Visual physical commonsense (V-PC)

  • The police car approaches, passes, and recedes from the pedestrian along the road with continuous motion.

Audio physical commonsense (A-PC)

  • The siren pitch is noticeably higher during the approach segment than during the receding segment, and the siren melody remains recognizable and consistent throughout.

Cross-modal physical commonsense (AV-PC)

  • The transition from higher to lower siren pitch aligns in time with the police car's visible passage past the pedestrian.