A mechanical metronome swings left and right. Each swing produces a precise ticking sound exactly at the turning points.
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 mechanical metronome
Event: a metronome arm swings back and forth
Audio presence
- a mechanical metronome
Sound: a metronome tick
Key standards
Visual physical commonsense (V-PC)
- A visible mechanical metronome with an inverted-pendulum arm swings symmetrically left and right at a steady tempo throughout the clip.
Audio physical commonsense (A-PC)
- The audible tick has the crisp precise click of a real mechanical metronome.
Cross-modal physical commonsense (AV-PC)
- Each visible moment the metronome arm reaches a turning point coincides in time with an audible tick.
- Each audible tick coincides in time with the visible moment the metronome arm reaches a turning point.