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A person speaks as they walk through a long concrete tunnel. Their voice picks up a long ringing tail and a flutter echo from the hard parallel walls.

C1-3-25 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 concrete tunnel

Event: a person walks and speaks in a tunnel

Audio presence

  • a person

Sound: a person speaking

Key standards

Visual physical commonsense (V-PC)

  • A single person walks forward through a concrete tunnel or corridor.
  • The person audibly speaks while walking through the tunnel.

Audio physical commonsense (A-PC)

  • The voice carries a sustained ringing reverberation tail with audible flutter modulation.
  • The reverberation character is consistent with hard parallel tunnel walls.

Cross-modal physical commonsense (AV-PC)

  • The speech audio aligns in time with the person's visible mouth movements.
  • The voice in the audio originates from the visibly walking person.