← all videos

A drum head is struck, producing a bright tone. Then water is sprinkled on the surface and it is struck again, sounding lower and deader.

C2-1-20 Event Transition · source_body principle: Mass Loading -> Pitch (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 drum
  • water

Event: a drum head is struck

Audio presence

  • a drum

Sound: a drum hit

Key standards

Visual physical commonsense (V-PC)

  • The drum head is visibly struck twice, and water is visibly sprinkled or poured onto the drum surface between the two strikes.

Audio physical commonsense (A-PC)

  • The second hit with water on the head is noticeably lower and more damped than the first hit.
  • Each strike sound has the characteristic drumhead impact timbre.

Cross-modal physical commonsense (AV-PC)

  • Each hit sound aligns in time with a visible strike of the drum head.
  • The lower and more damped hit corresponds to the drum after water is added.
  • The brighter hit corresponds to the dry drum.