2. 音声書き起こし - n8n制作（テンプレート）

• •Googleアカウント + Gmail API認証情報
• •Google Drive API認証情報
• •ターゲットAPIの認証情報が必要な場合あり
• •OpenAI API Key

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  "name": "Only Onform submission_Two-Source Audio Transcription--> AI summary & Sentiment Analysis--> Gmail delivery",
  "tags": [],
  "nodes": [
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        "content": "### Execution flow Form submission + Local file\n#### Upload an audio file \n"
      },
      "typeVersion": 1
    },
    {
      "id": "8b93808e-44cb-4f86-aac7-c8ead6cca669",
      "name": "付箋2",
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      "parameters": {
        "color": 2,
        "width": 608,
        "height": 352,
        "content": "### Generate Transcript from Voice to text"
      },
      "typeVersion": 1
    },
    {
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      "name": "付箋3",
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      "position": [
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      "parameters": {
        "color": 6,
        "width": 608,
        "height": 352,
        "content": "### Generate summary, Sentiment Analysis and send E-mail"
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      "name": "付箋4",
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        "width": 432,
        "height": 272,
        "content": " ### Assembly AI\n"
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      "name": "付箋6",
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        "content": " ### Assembly AI\n"
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    {
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      "name": "文字起こし取得",
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      "position": [
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      "parameters": {
        "url": "=https://api.assemblyai.com/v2/transcript/{{ $json.id }}",
        "options": {},
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "authorization",
              "value": "<< PROVIDE YOUR ASSEMBLY API KEY >>"
            },
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              "name": "Content-Type",
              "value": "application/json"
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      "typeVersion": 4.2
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      "parameters": {
        "modelId": {
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          "mode": "id",
          "value": "={{ \"gpt-4.1-mini\" }}"
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        "options": {},
        "messages": {
          "values": [
            {
              "content": "You are a precise meeting analyst. Output must be valid JSON only."
            },
            {
              "role": "system",
              "content": "=Analyze the following transcript and return strict JSON:\n\nTranscript:\n{{ $node[\"Get Transcript\"].json[\"text\"] }}\n\nRequirements:\n- summary: 120–180 words, crisp and neutral\n- sentiment_label: one of [\"Positive\",\"Neutral\",\"Negative\"]\n- sentiment_score: number from -1 to 1\n- key_points: 5–8 bullet points (short phrases)\n- action_items: array of {owner, task, due?} if present, else []\n- notable_quotes: array of short verbatim quotes (<=120 chars)\n- topics: 3–6 tags\n\nReturn JSON with keys in snake_case:\n{\n  \"summary\": \"...\",\n  \"sentiment_label\": \"Positive\",\n  \"sentiment_score\": 0.64,\n  \"key_points\": [\"...\"],\n  \"action_items\": [{\"owner\":\"Alice\",\"task\":\"...\",\"due\":\"2025-09-30\"}],\n  \"notable_quotes\": [\"...\"],\n  \"topics\": [\"...\",\"...\"]\n}\nNo preamble or Markdown—JSON only."
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        "jsonOutput": true
      },
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      "name": "分析メール送信",
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      "parameters": {
        "sendTo": "=<< PROVIDE YOUR GMAIL ID >>",
        "message": "={{\n(() => {\n  const d = $node[\"Transcript Analysis (AI)\"].json.message.content;\n\n  const row = (label, value, i) =>\n    `<tr style=\"background-color:${i % 2 === 0 ? '#f9f9f9' : '#ffffff'};\">\n       <td style=\"padding:12px 16px;border:1px solid #ccc;font-weight:bold;width:220px;background:#f2f2f2;\">${label}</td>\n       <td style=\"padding:12px 16px;border:1px solid #ccc;\">${value || ''}</td>\n     </tr>`;\n\n  const ul = arr => `<ul style=\"margin:0;padding-left:22px;\">${(arr || []).map(x => `<li>${x}</li>`).join('')}</ul>`;\n\n  const actions = (d.action_items || []).length\n    ? `<ol style=\"margin:0;padding-left:22px;\">${d.action_items.map(a =>\n        `<li><strong>${a.owner || '—'}</strong>: ${a.task || ''}${a.due ? ' (Due: ' + a.due + ')' : ''}</li>`\n      ).join('')}</ol>`\n    : \"No explicit action items detected.\";\n\n  let html = `\n  <div style=\"font-family:Arial,sans-serif;font-size:16px;line-height:1.5;\">\n    <h2 style=\"color:#2c3e50;border-bottom:2px solid #2c3e50;padding-bottom:6px;margin-bottom:12px;\">Transcript Analysis</h2>\n    <table style=\"border-collapse:collapse;border:1px solid #ccc;width:100%;font-size:16px;\">\n      <thead>\n        <tr style=\"background:#2c3e50;color:#ffffff;\">\n          <th style=\"padding:12px 16px;text-align:left;width:220px;\">Section</th>\n          <th style=\"padding:12px 16px;text-align:left;\">Details</th>\n        </tr>\n      </thead>\n      <tbody>\n        ${row(\"Executive Summary\", d.summary, 0)}\n        ${row(\"Sentiment\", `<strong>Label:</strong> ${d.sentiment_label || ''}<br/><strong>Score:</strong> ${d.sentiment_score ?? ''}`, 1)}\n        ${row(\"Key Points\", ul(d.key_points), 2)}\n        ${row(\"Action Items\", actions, 3)}\n        ${row(\"Notable Quotes\", ul(d.notable_quotes), 4)}\n        ${row(\"Topics\", (d.topics || []).join(\", \"), 5)}\n      </tbody>\n    </table>\n  </div>\n  `;\n\n  return html;\n})()\n}}\n",
        "options": {},
        "subject": "=Transcript summary & sentiment – \n {{ $now.toISO() }} \n"
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        "content": "### Execution flow Form submission + Google Drive link\n#### Receive Google Drive Link "
      },
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    },
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        "content": " ### Assembly AI\n"
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    {
      "id": "00ade2c9-7a3e-4e92-abff-342c71c0bc8f",
      "name": "リンクからファイルIDを抽出",
      "type": "n8n-nodes-base.code",
      "position": [
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      "parameters": {
        "jsCode": "const link =\n  $json['Provide the URL/Link of the audio file'] ||\n  $json.drive_link ||\n  '';\n\nconst m = link.match(/(?:\\/d\\/|id=)([A-Za-z0-9_-]{20,})/);\nif (!m) {\n  throw new Error('Could not extract Google Drive file ID from the form field.');\n}\n\nreturn [{ fileId: m[1] }];\n"
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      "typeVersion": 2
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      "name": "Google ドライブからファイルを取得",
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      "parameters": {
        "fileId": {
          "__rl": true,
          "mode": "id",
          "value": "={{ $json.fileId }}"
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        "options": {
          "binaryPropertyName": "file"
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        "operation": "download"
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      "credentials": {
        "googleDriveOAuth2Api": {
          "id": "RVWXcWPinJDBkS1P",
          "name": "<< PROVIDE THE DRIVE NAME >>"
        }
      },
      "typeVersion": 3
    },
    {
      "id": "504cfac0-19d2-4d0a-b7e8-97be9f450212",
      "name": "ファイルをAssemblyAIにアップロード",
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      "parameters": {
        "url": "https://api.assemblyai.com/v2/upload",
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        "sendBody": true,
        "contentType": "binaryData",
        "sendHeaders": true,
        "headerParameters": {
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              "value": "<< PROVIDE YOUR ASSEMBLY API KEY >>"
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      "id": "2b514d7f-49b2-4e82-aaa9-6ead8b7154bf",
      "name": "音声ファイルをAssemblyAIにアップロード1",
      "type": "n8n-nodes-base.httpRequest",
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      "parameters": {
        "url": "https://api.assemblyai.com/v2/upload",
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        "options": {},
        "sendBody": true,
        "contentType": "binaryData",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
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              "name": "authorization",
              "value": "<< PROVIDE YOUR ASSEMBLY API KEY >>"
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              "name": "Content-Type",
              "value": "application/json"
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          ]
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        "inputDataFieldName": "Upload_file"
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      "typeVersion": 4.2
    },
    {
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      "name": "AssemblyAIに文字起こしをリクエスト",
      "type": "n8n-nodes-base.httpRequest",
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      ],
      "parameters": {
        "url": "https://api.assemblyai.com/v2/transcript",
        "method": "POST",
        "options": {},
        "jsonBody": "={\n  \"audio_url\": \"{{$json.upload_url}}\",\n  \"speaker_labels\": false,\n  \"auto_highlights\": true,\n  \"punctuate\": true\n}\n",
        "sendBody": true,
        "sendHeaders": true,
        "specifyBody": "json",
        "headerParameters": {
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              "name": "authorization",
              "value": "<< PROVIDE YOUR ASSEMBLY API KEY >>"
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        "url": "https://api.assemblyai.com/v2/transcript",
        "method": "POST",
        "options": {},
        "sendBody": true,
        "sendHeaders": true,
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              "name": "audio_url",
              "value": "={{ $json.upload_url }}"
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              "name": "authorization",
              "value": "<< PROVIDE YOUR ASSEMBLY API KEY >>"
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      "typeVersion": 4.2
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    {
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      "name": "フォーム送信時の音声",
      "type": "n8n-nodes-base.formTrigger",
      "position": [
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      "webhookId": "5fcc6c50-5848-4f95-9cac-dc750a25dcc7",
      "parameters": {
        "options": {},
        "formTitle": "Upload your Audio file",
        "formFields": {
          "values": [
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              "fieldLabel": "Name of the Audio file",
              "requiredField": true
            },
            {
              "fieldLabel": "Provide the URL/Link of the audio file",
              "requiredField": true
            },
            {
              "fieldType": "email",
              "fieldLabel": "E-mail",
              "placeholder": "abc@gmail.com",
              "requiredField": true
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        "formDescription": "The audio file will be transcribed, Analysed and summarised. "
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        "formTitle": "Upload your Audio file",
        "formFields": {
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              "requiredField": true
            },
            {
              "fieldType": "file",
              "fieldLabel": "Upload file",
              "requiredField": true,
              "acceptFileTypes": "e.g .MP4"
            },
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              "fieldType": "email",
              "fieldLabel": "E-mail",
              "placeholder": "abc@gmail.com",
              "requiredField": true
            }
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        },
        "formDescription": "The audio file will be transcribed, Analysed and summarised. "
      },
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    },
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      "name": "付箋",
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      "position": [
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      "parameters": {
        "width": 656,
        "height": 1200,
        "content": "# Try It Out!\n\nThis n8n template demonstrates how to use AI to transform audio files into **actionable insights**.  \nIt supports both **local file uploads** and **Google Drive links**.  \n\n## How it works\n\n- Users upload an audio file **via form** or provide a **Google Drive link**  \n- Files are passed to **AssemblyAI** for transcription  \n- AssemblyAI converts audio → text with punctuation and highlights  \n- A loop with **Wait + If** ensures the transcript is ready before moving forward  \n- Transcript text is passed to **OpenAI** (via n8n LangChain)  \n- OpenAI generates a **structured summary** including:  \n  - Executive summary  \n  - Sentiment label + score  \n  - Key points and highlights  \n  - Action items (if detected)  \n  - Notable quotes  \n  - Topics  \n- The AI output is formatted into a **rich HTML email**  \n- Gmail node sends the email to the provided recipient  \n- The workflow ends with a clean, structured delivery  \n\n---\n\n## How to use\n\n- Replace the **manual trigger** with your own (e.g., webhook or form submission)  \n- Provide either a **local audio file** or a **Google Drive link**  \n- Ensure AssemblyAI and Gmail credentials are set in n8n  \n- Run the workflow end-to-end to generate insights  \n- Check your email inbox for the **analysis report**  \n- Use it for meetings, lectures, or podcasts instantly  \n\n---\n\n## Requirements\n\n- n8n instance with HTTP + Gmail integration  \n- **AssemblyAI account** for transcription  \n- **OpenAI account** (or equivalent LLM integration) for analysis  \n- Google Drive (optional, if using Drive links)  \n\n---\n\n## Need Help?\n\n- Join the [n8n Forum](https://community.n8n.io)  \n- Or connect with the n8n Discord community  \n\nHappyAutomating !!! \n"
      },
      "typeVersion": 1
    }
  ],
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  "pinData": {},
  "settings": {
    "executionOrder": "v1"
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