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A drummer rolls on a snare drum, starting with barely audible taps and building gradually to thunderous hits.

C2-2-08 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
  • drumsticks

Event: a drummer performs a roll on a snare drum

Audio presence

  • a snare drum

Sound: a snare drum roll

Key standards

Visual physical commonsense (V-PC)

  • The drummer performs a continuous roll specifically on the snare drum, with the stick motion visibly intensifying from light taps to larger motions throughout the clip.

Audio physical commonsense (A-PC)

  • The roll rises progressively in loudness from barely-audible taps to thunderous hits, in a smooth continuous crescendo.
  • The sound is a real snare drum roll.

Cross-modal physical commonsense (AV-PC)

  • The rising loudness aligns in time with the visibly intensifying stick motion.
  • The loudest hits correspond to the largest visible stick amplitudes.
  • The quietest taps correspond to the smallest visible stick motion.