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A bicycle bell rings with a small short tinkle. The scene cuts to a locomotive horn blasting with a powerful roar.

C2-2-19 Event Transition · source_excitation principle: Sound Source Power Comparison (Mechanics)
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 bicycle bell
  • a locomotive horn

Event: a bicycle bell rings and a locomotive horn blasts

Audio presence

  • a bicycle bell
  • a locomotive horn

Sound: ['bicycle bell tinkle', 'locomotive horn roar']

Key standards

Visual physical commonsense (V-PC)

  • The clip shows both a bicycle with its bell visibly rung and, after a scene cut, a locomotive with its horn visibly blasting.

Audio physical commonsense (A-PC)

  • The locomotive horn blast is substantially louder than the bicycle bell tinkle.
  • The first sound is a real bicycle bell tinkle.
  • The second sound is a real locomotive horn blast.

Cross-modal physical commonsense (AV-PC)

  • The bell ring sound aligns in time with the visible bell ring action.
  • The horn blast sound aligns in time with the visible horn blast action.