← all videos

A person speaks in a bare unfurnished apartment. Their voice sounds bright and ringy, with a clear echo bouncing off the empty hard walls.

C1-3-31 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
  • an unfurnished apartment

Event: a person speaks inside a bare apartment

Audio presence

  • a person

Sound: a person speaking

Key standards

Visual physical commonsense (V-PC)

  • A single person speaks inside an unfurnished apartment.
  • The apartment has hard bare walls and minimal or no furniture visible.

Audio physical commonsense (A-PC)

  • The voice carries a bright ringy reverberation.
  • The reverberation is consistent with reflections off hard bare apartment 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 speaking person.