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A drummer strikes a drum in close-up. The stick contacts the drum head and the sharp drum hit sounds at the exact same instant.

C1-3-41 Steady State · sound_persistence principle: Temporal Alignment (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 drummer
  • a drumstick
  • a drum

Event: a drumstick strikes a drum head

Audio presence

  • a drum

Sound: a drum hit

Key standards

Visual physical commonsense (V-PC)

  • A drumstick swings down and visibly contacts the top membrane of the drum head in continuous physically plausible motion.

Audio physical commonsense (A-PC)

  • Each drum-hit sound has the sharp attack and brief resonant body of a stick striking a drum head.

Cross-modal physical commonsense (AV-PC)

  • Each visible stick-on-head contact coincides in time with an audible drum-hit onset.
  • Each audible drum-hit onset coincides in time with a visible stick-on-head contact.