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A person blows across the opening of a large bottle and a deep low tone hums out. Then blows across a small bottle and a noticeably higher tone hums out.

C2-1-45 Event Transition · source_body principle: Helmholtz Resonance (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 person
  • a large bottle
  • a small bottle

Event: a person blows across the openings of two bottles

Audio presence

  • a bottle

Sound: bottle resonance tone

Key standards

Visual physical commonsense (V-PC)

  • A person blows breath horizontally across the lip of a large bottle.
  • A person also blows breath horizontally across the lip of a clearly smaller bottle.

Audio physical commonsense (A-PC)

  • The large bottle's tone is noticeably lower in pitch than the small bottle's tone.
  • Both tones have the steady character of a Helmholtz cavity resonance.
  • The two resonance tones play sequentially without simultaneous overlap.

Cross-modal physical commonsense (AV-PC)

  • Each resonance tone onset coincides with the corresponding visible breath across that bottle's opening.
  • The lower-pitched tone is produced by the visibly larger bottle.
  • The higher-pitched tone is produced by the visibly smaller bottle.