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A piano plays continuously on the left side of the listener. The deep notes stay firmly on the left with no drift.

C1-2-05 Steady State · source_anchoring principle: Static Source Lateralization (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 piano

Event: a piano is played

Audio presence

  • a piano

Sound: piano playing

Key standards

Visual physical commonsense (V-PC)

  • A visible piano is positioned on the left side of the frame throughout the clip and is being played by a visible human hand.

Audio physical commonsense (A-PC)

  • The audible notes carry the deep resonant tonal character of a real piano.

Cross-modal physical commonsense (AV-PC)

  • The piano notes are dominantly localized to the left side of the audio field, matching the visible left-side position of the piano.
  • The clip's audio is produced by a single visible piano source.