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A drummer taps a snare drum very lightly, barely audible. Then hits with full force, producing a loud sharp crack.

C2-2-05 Event Transition · source_excitation principle: Strike Force -> Loudness (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 drummer
  • a snare drum
  • a drumstick

Event: a drummer strikes a snare drum

Audio presence

  • a snare drum

Sound: a snare drum hit

Key standards

Visual physical commonsense (V-PC)

  • The drumstick visibly strikes the snare drum twice, first as a barely-there tap and then with clearly full force.

Audio physical commonsense (A-PC)

  • The full-force hit is noticeably louder than the light tap.
  • Each strike has the characteristic snare drum impact timbre.

Cross-modal physical commonsense (AV-PC)

  • Each drum hit sound aligns in time with a visible stick impact on the snare drum.
  • The louder hit corresponds to the full-force stick strike.
  • The quieter tap corresponds to the light stick tap.