Automate Audio Transcription & Summarization with n8n, Google Drive & OpenAI

1. What This Automation Does

This workflow watches a chosen Google Drive folder for new audio files.

When a file arrives, it downloads the audio, turns speech into text, and then makes a full summary.

The summary includes titles, main points, action items with dates, follow-ups, topics, and mood analysis.

It sends the result directly into Notion as a new note, all without needing any manual work.

Lisa, a busy project manager, can now save hours and keep notes accurate and easy to find.

2. Who Should Use This Workflow

This setup helps people who often record meetings, calls, or interviews.

It is good for managers, journalists, researchers, and anyone needing quick, reliable meeting notes.

It is also useful for teams that share insights via Notion and want to automate note-taking.

3. Tools and Services Used

• n8n: Automation workflow builder that runs the workflow.
• Google Drive API: Watches and downloads new audio files automatically.
• OpenAI Whisper API: Transcribes audio speech to text.
• OpenAI GPT-4 Turbo API: Creates detailed summaries in JSON format from transcripts.
• Notion API: Adds the summarized content as pages inside a Notion workspace.

4. Beginner Step-by-Step: How to Use This Workflow in n8n

Step 1: Import Workflow

1. Download the workflow file by clicking the Download button on this page.
2. Open the n8n editor, then choose Import from File.
3. Select the downloaded workflow file to import it.

Step 2: Configure Credentials and IDs

1. Add your Google Drive OAuth2 credentials in n8n’s credential manager.
2. Add your OpenAI API key for both Whisper and GPT-4 Turbo nodes.
3. Add Notion API credentials to allow page creation.
4. Update the Google Drive folder ID in the Google Drive Trigger node to your recordings folder.
5. Update the Notion page or database ID in the Notion node where summaries should be stored.

Step 3: Test the Workflow

1. Upload a sample audio file into your chosen Google Drive folder.
2. Watch the workflow run in the n8n dashboard.
3. Check the Notion workspace for the new summary page.

Step 4: Activate for Production

1. Turn the workflow’s Active toggle on to enable continuous running.
2. Leave the workflow running inside n8n or self-host n8n to run it on your own server.

5. Inputs, Processing Steps, and Outputs

Inputs

• New audio files added to the specified Google Drive folder.

Processing Steps

• The Google Drive Trigger node detects new files.
• The Google Drive node downloads the audio file binary data.
• The OpenAI (Audio Transcription) node transcribes speech to text with Whisper.
• The OpenAI (GPT-4 Turbo) node receives the transcript text, then creates a detailed, structured JSON summary.
• The Notion node takes the JSON and creates a new page in the user’s workspace with organized content blocks.

Outputs

• A new Notion page containing a well-organized meeting summary with titles, main points, dated action items, topic tags, and sentiment analysis.

6. Common Problems and How to Fix Them

Problem 1: No files detected by Google Drive Trigger

Cause: Wrong folder ID or lack of folder access.

Fix: Check the folder ID carefully. Make sure the Google Drive account linked has permission to the folder.

Problem 2: Failing to download files

Cause: Incorrectly mapped file ID or expired Google Drive credentials.

Fix: Ensure mapping uses {{$json.id}} from the trigger output. Refresh Google Drive OAuth credentials in n8n.

Problem 3: Empty or error results from OpenAI Whisper

Cause: Corrupted audio, unsupported audio format, or hitting API limits.

Fix: Try testing with clear, supported audio files. Check OpenAI usage quotas and confirm audio format compatibility.

Problem 4: Notion page creation fails

Cause: Incorrect page ID or missing API permissions for Notion.

Fix: Verify Notion workspace page or database ID. Check that API keys have correct permissions.

7. Customizations

• Change the Google Drive folder by updating the folder ID in the Google Drive Trigger node.
• Tweak the GPT-4 Turbo system prompt to control how detailed or simple the summary should be.
• Add date-tagged reminders for action items directly in Notion by extending the Notion node setup.
• Support more audio formats by adjusting the binary property handling in the Google Drive node.
• Send notifications to Slack by adding a Slack node after the Notion node when a summary is created.

8. Sample OpenAI GPT-4 Turbo System Prompt

This prompt guides the GPT-4 Turbo node to create a structured summary in JSON. Use it exactly in the messages field inside the node.

{
  "system": "Summarize audio content into a structured JSON format ... Use English keys only ... Include action items date-tagged in ISO 601 ... Return only valid JSON.",
  "user": "Today is {{ $now }}, Transcript: {{ $('OpenAI').item.json.text }}"
}

9. How to Set Up Production in n8n

Import Workflow and Configure

1. Download the workflow by clicking the Download button on this page.
2. In the n8n editor, select Import from File and pick your workflow file.
3. After import, add Google Drive, OpenAI, and Notion API keys in credentials.
4. Change folder IDs or page IDs as needed to fit your setup.

Run and Activate

1. Test the workflow by putting an audio file into the watched Google Drive folder.
2. Check Notion for the new summary page.
3. Turn on the workflow using the Active slider.
4. For long-run use, consider self-host n8n to keep the workflow running on your server.

10. Summary of Benefits

✓ Saves many hours previously spent on manual transcription and note-taking.

✓ Removes errors by automating transcription and summary creation.

✓ Provides clear, structured meeting notes directly in Notion without extra effort.

→ Makes meeting information easy to access, share, and use for follow-ups.

→ Frees time for more important project work by removing tedious tasks.