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A person drops a metal tool in a large parking garage. The clang is followed by a long ringing tail bouncing between the concrete walls.

C1-3-29 Steady State · sound_persistence principle: Reverberation (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 person
  • a metal tool
  • a parking garage

Event: a metal tool is dropped onto a garage floor

Audio presence

  • a metal tool

Sound: a metallic clang

Key standards

Visual physical commonsense (V-PC)

  • A person drops or throws a metal tool that lands on the floor of a parking garage.
  • The tool maintains a rigid metallic shape throughout the drop and impact.

Audio physical commonsense (A-PC)

  • The metallic clang is followed by a long ringing reverberation tail.
  • The reverberation is consistent with reflections between concrete parking-garage walls.

Cross-modal physical commonsense (AV-PC)

  • The clang onset in the audio aligns in time with the visible impact of the tool on the floor.
  • The ringing reverberation in the audio follows the visible impact event as its consequence.