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A guitarist plucks an open string producing a low note, then presses down higher up the neck and plucks again, producing a much higher note.

C2-1-02 Event Transition · source_body principle: Vibrating Length -> Pitch (Mechanics)
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Per-prompt rubric

Basic standards

Visual presence

  • a guitarist
  • a guitar

Event: a guitarist plucks a guitar string

Audio presence

  • a guitar

Sound: a plucked guitar note

Key standards

Visual physical commonsense (V-PC)

  • The guitarist plucks a single string twice: once with no fingers pressing the neck (open string), and once after one or more fingers press down higher up the neck.

Audio physical commonsense (A-PC)

  • The second plucked note has a noticeably higher pitch than the first plucked note.

Cross-modal physical commonsense (AV-PC)

  • Each plucked note onset aligns in time with a visible pluck of the guitar string.
  • The pluck that produces the higher pitch aligns in time with the visible fingering higher up the neck; the lower pitch aligns with fingering on an open string or lower on the neck.