Update to Musical

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        "Use Musical to quiz me on intervals.",
        "Use Musical to drill me on chord spelling at an intermediate level.",
        "Use Musical to run a practice session on key signatures."
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      "developer_name": "Nico Tejera",
      "logo_url": "https://files.openai.com/content?id=file_00000000261881f4b953fda94ed7e193",
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      "notation"
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