{
  "schema_version": "1.0.0",
  "content_version": "1.0.0",
  "module_id": "m23",
  "title": "Treble Staff Basics",
  "seed": 710041,
  "preset": {
    "id": "treble-staff-beginner",
    "difficulty": "beginner",
    "item_count": 10,
    "candidate_set": [
      "C4",
      "D4",
      "E4",
      "F4",
      "G4",
      "A4",
      "B4",
      "C5"
    ],
    "pitch_range_midi": [
      60,
      79
    ],
    "tempo_bpm": 90,
    "meter": [
      4,
      4
    ],
    "hints": true
  },
  "purpose": "Name written pitches in the treble clef.",
  "instructions": {
    "student": "Read each written pitch directly. At challenge level, keep sharp or flat spelling even when another name sounds the same.",
    "teacher": "Play each numbered question from this page. Use the same replay policy for all learners. Keep the answer section separate until the first response is recorded. For tapping tasks, record an observation on paper; use the online trainer for device-timed scoring.",
    "follow_up": "Read fresh positions without carrying an accidental from the previous question into a new exercise."
  },
  "examples": {
    "demonstration": {
      "id": "m23-712364-0",
      "seed": 712364,
      "kind": "staff",
      "events": [
        {
          "midi": 64,
          "onset_beats": 0,
          "duration_beats": 1.5,
          "velocity": 0.7,
          "voice_id": "triangle"
        }
      ],
      "choices": [
        {
          "id": "D4",
          "label": "D4"
        },
        {
          "id": "C4",
          "label": "C4"
        },
        {
          "id": "C5",
          "label": "C5"
        },
        {
          "id": "B4",
          "label": "B4"
        },
        {
          "id": "E4",
          "label": "E4"
        },
        {
          "id": "A4",
          "label": "A4"
        }
      ],
      "answer": "E4",
      "explanation": "This written note is E4 in the treble clef (329.63 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "E4"
        ]
      },
      "total_beats": 2
    },
    "comparison": {
      "id": "m23-712364-0",
      "seed": 712364,
      "kind": "staff",
      "events": [
        {
          "midi": 65,
          "onset_beats": 0,
          "duration_beats": 1.5,
          "velocity": 0.7,
          "voice_id": "triangle"
        }
      ],
      "choices": [
        {
          "id": "E4",
          "label": "E4"
        },
        {
          "id": "D4",
          "label": "D4"
        },
        {
          "id": "C4",
          "label": "C4"
        },
        {
          "id": "C5",
          "label": "C5"
        },
        {
          "id": "F4",
          "label": "F4"
        },
        {
          "id": "B4",
          "label": "B4"
        }
      ],
      "answer": "F4",
      "explanation": "This written note is F4 in the treble clef (349.23 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "F4"
        ]
      },
      "total_beats": 2
    },
    "seed": 712364,
    "comparisonSeed": 712364
  },
  "questions": [
    {
      "id": "m23-710041-0",
      "seed": 710041,
      "kind": "staff",
      "events": [
        {
          "midi": 60,
          "onset_beats": 0,
          "duration_beats": 1.5,
          "velocity": 0.7,
          "voice_id": "triangle"
        }
      ],
      "choices": [
        {
          "id": "C4",
          "label": "C4"
        },
        {
          "id": "A4",
          "label": "A4"
        },
        {
          "id": "G4",
          "label": "G4"
        },
        {
          "id": "B4",
          "label": "B4"
        },
        {
          "id": "C5",
          "label": "C5"
        },
        {
          "id": "F4",
          "label": "F4"
        }
      ],
      "answer": "C4",
      "explanation": "This written note is C4 in the treble clef (261.63 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "C4"
        ]
      },
      "total_beats": 2
    },
    {
      "id": "m23-710041-1",
      "seed": 717960,
      "kind": "staff",
      "events": [
        {
          "midi": 72,
          "onset_beats": 0,
          "duration_beats": 1.5,
          "velocity": 0.7,
          "voice_id": "triangle"
        }
      ],
      "choices": [
        {
          "id": "B4",
          "label": "B4"
        },
        {
          "id": "E4",
          "label": "E4"
        },
        {
          "id": "D4",
          "label": "D4"
        },
        {
          "id": "A4",
          "label": "A4"
        },
        {
          "id": "C5",
          "label": "C5"
        },
        {
          "id": "G4",
          "label": "G4"
        }
      ],
      "answer": "C5",
      "explanation": "This written note is C5 in the treble clef (523.25 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "C5"
        ]
      },
      "total_beats": 2
    },
    {
      "id": "m23-710041-2",
      "seed": 725879,
      "kind": "staff",
      "events": [
        {
          "midi": 64,
          "onset_beats": 0,
          "duration_beats": 1.5,
          "velocity": 0.7,
          "voice_id": "triangle"
        }
      ],
      "choices": [
        {
          "id": "E4",
          "label": "E4"
        },
        {
          "id": "G4",
          "label": "G4"
        },
        {
          "id": "B4",
          "label": "B4"
        },
        {
          "id": "D4",
          "label": "D4"
        },
        {
          "id": "F4",
          "label": "F4"
        },
        {
          "id": "A4",
          "label": "A4"
        }
      ],
      "answer": "E4",
      "explanation": "This written note is E4 in the treble clef (329.63 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "E4"
        ]
      },
      "total_beats": 2
    },
    {
      "id": "m23-710041-3",
      "seed": 733798,
      "kind": "staff",
      "events": [
        {
          "midi": 67,
          "onset_beats": 0,
          "duration_beats": 1.5,
          "velocity": 0.7,
          "voice_id": "triangle"
        }
      ],
      "choices": [
        {
          "id": "C5",
          "label": "C5"
        },
        {
          "id": "F4",
          "label": "F4"
        },
        {
          "id": "D4",
          "label": "D4"
        },
        {
          "id": "B4",
          "label": "B4"
        },
        {
          "id": "E4",
          "label": "E4"
        },
        {
          "id": "G4",
          "label": "G4"
        }
      ],
      "answer": "G4",
      "explanation": "This written note is G4 in the treble clef (392.00 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "G4"
        ]
      },
      "total_beats": 2
    },
    {
      "id": "m23-710041-4",
      "seed": 741717,
      "kind": "staff",
      "events": [
        {
          "midi": 67,
          "onset_beats": 0,
          "duration_beats": 1.5,
          "velocity": 0.7,
          "voice_id": "triangle"
        }
      ],
      "choices": [
        {
          "id": "E4",
          "label": "E4"
        },
        {
          "id": "C5",
          "label": "C5"
        },
        {
          "id": "C4",
          "label": "C4"
        },
        {
          "id": "A4",
          "label": "A4"
        },
        {
          "id": "F4",
          "label": "F4"
        },
        {
          "id": "G4",
          "label": "G4"
        }
      ],
      "answer": "G4",
      "explanation": "This written note is G4 in the treble clef (392.00 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "G4"
        ]
      },
      "total_beats": 2
    },
    {
      "id": "m23-710041-5",
      "seed": 749636,
      "kind": "staff",
      "events": [
        {
          "midi": 72,
          "onset_beats": 0,
          "duration_beats": 1.5,
          "velocity": 0.7,
          "voice_id": "triangle"
        }
      ],
      "choices": [
        {
          "id": "A4",
          "label": "A4"
        },
        {
          "id": "F4",
          "label": "F4"
        },
        {
          "id": "G4",
          "label": "G4"
        },
        {
          "id": "C5",
          "label": "C5"
        },
        {
          "id": "D4",
          "label": "D4"
        },
        {
          "id": "E4",
          "label": "E4"
        }
      ],
      "answer": "C5",
      "explanation": "This written note is C5 in the treble clef (523.25 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "C5"
        ]
      },
      "total_beats": 2
    },
    {
      "id": "m23-710041-6",
      "seed": 757555,
      "kind": "staff",
      "events": [
        {
          "midi": 67,
          "onset_beats": 0,
          "duration_beats": 1.5,
          "velocity": 0.7,
          "voice_id": "triangle"
        }
      ],
      "choices": [
        {
          "id": "G4",
          "label": "G4"
        },
        {
          "id": "E4",
          "label": "E4"
        },
        {
          "id": "A4",
          "label": "A4"
        },
        {
          "id": "B4",
          "label": "B4"
        },
        {
          "id": "C5",
          "label": "C5"
        },
        {
          "id": "C4",
          "label": "C4"
        }
      ],
      "answer": "G4",
      "explanation": "This written note is G4 in the treble clef (392.00 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "G4"
        ]
      },
      "total_beats": 2
    },
    {
      "id": "m23-710041-7",
      "seed": 765474,
      "kind": "staff",
      "events": [
        {
          "midi": 67,
          "onset_beats": 0,
          "duration_beats": 1.5,
          "velocity": 0.7,
          "voice_id": "triangle"
        }
      ],
      "choices": [
        {
          "id": "F4",
          "label": "F4"
        },
        {
          "id": "A4",
          "label": "A4"
        },
        {
          "id": "G4",
          "label": "G4"
        },
        {
          "id": "C4",
          "label": "C4"
        },
        {
          "id": "D4",
          "label": "D4"
        },
        {
          "id": "B4",
          "label": "B4"
        }
      ],
      "answer": "G4",
      "explanation": "This written note is G4 in the treble clef (392.00 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "G4"
        ]
      },
      "total_beats": 2
    },
    {
      "id": "m23-710041-8",
      "seed": 773393,
      "kind": "staff",
      "events": [
        {
          "midi": 71,
          "onset_beats": 0,
          "duration_beats": 1.5,
          "velocity": 0.7,
          "voice_id": "triangle"
        }
      ],
      "choices": [
        {
          "id": "B4",
          "label": "B4"
        },
        {
          "id": "C4",
          "label": "C4"
        },
        {
          "id": "A4",
          "label": "A4"
        },
        {
          "id": "E4",
          "label": "E4"
        },
        {
          "id": "C5",
          "label": "C5"
        },
        {
          "id": "D4",
          "label": "D4"
        }
      ],
      "answer": "B4",
      "explanation": "This written note is B4 in the treble clef (493.88 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "B4"
        ]
      },
      "total_beats": 2
    },
    {
      "id": "m23-710041-9",
      "seed": 781312,
      "kind": "staff",
      "events": [
        {
          "midi": 67,
          "onset_beats": 0,
          "duration_beats": 1.5,
          "velocity": 0.7,
          "voice_id": "triangle"
        }
      ],
      "choices": [
        {
          "id": "F4",
          "label": "F4"
        },
        {
          "id": "G4",
          "label": "G4"
        },
        {
          "id": "E4",
          "label": "E4"
        },
        {
          "id": "C4",
          "label": "C4"
        },
        {
          "id": "D4",
          "label": "D4"
        },
        {
          "id": "B4",
          "label": "B4"
        }
      ],
      "answer": "G4",
      "explanation": "This written note is G4 in the treble clef (392.00 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "G4"
        ]
      },
      "total_beats": 2
    }
  ],
  "answer_key": [
    {
      "number": 1,
      "question_id": "m23-710041-0",
      "answer": "C4",
      "label": "C4",
      "explanation": "This written note is C4 in the treble clef (261.63 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "C4"
        ]
      },
      "total_beats": 2
    },
    {
      "number": 2,
      "question_id": "m23-710041-1",
      "answer": "C5",
      "label": "C5",
      "explanation": "This written note is C5 in the treble clef (523.25 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "C5"
        ]
      },
      "total_beats": 2
    },
    {
      "number": 3,
      "question_id": "m23-710041-2",
      "answer": "E4",
      "label": "E4",
      "explanation": "This written note is E4 in the treble clef (329.63 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "E4"
        ]
      },
      "total_beats": 2
    },
    {
      "number": 4,
      "question_id": "m23-710041-3",
      "answer": "G4",
      "label": "G4",
      "explanation": "This written note is G4 in the treble clef (392.00 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "G4"
        ]
      },
      "total_beats": 2
    },
    {
      "number": 5,
      "question_id": "m23-710041-4",
      "answer": "G4",
      "label": "G4",
      "explanation": "This written note is G4 in the treble clef (392.00 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "G4"
        ]
      },
      "total_beats": 2
    },
    {
      "number": 6,
      "question_id": "m23-710041-5",
      "answer": "C5",
      "label": "C5",
      "explanation": "This written note is C5 in the treble clef (523.25 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "C5"
        ]
      },
      "total_beats": 2
    },
    {
      "number": 7,
      "question_id": "m23-710041-6",
      "answer": "G4",
      "label": "G4",
      "explanation": "This written note is G4 in the treble clef (392.00 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "G4"
        ]
      },
      "total_beats": 2
    },
    {
      "number": 8,
      "question_id": "m23-710041-7",
      "answer": "G4",
      "label": "G4",
      "explanation": "This written note is G4 in the treble clef (392.00 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "G4"
        ]
      },
      "total_beats": 2
    },
    {
      "number": 9,
      "question_id": "m23-710041-8",
      "answer": "B4",
      "label": "B4",
      "explanation": "This written note is B4 in the treble clef (493.88 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "B4"
        ]
      },
      "total_beats": 2
    },
    {
      "number": 10,
      "question_id": "m23-710041-9",
      "answer": "G4",
      "label": "G4",
      "explanation": "This written note is G4 in the treble clef (392.00 Hz at A4 = 440 Hz).",
      "notation": {
        "clef": "treble",
        "notes": [
          "G4"
        ]
      },
      "total_beats": 2
    }
  ],
  "record": {
    "learner": "",
    "date": "",
    "first_responses": "",
    "same_question_corrections": "",
    "new_question_check": ""
  }
}