# Convert newsletters into AI podcasts with OpenAI: n8n workflow

> Started by an arriving email, and works across Gmail. It hands the judgement calls to OpenAI.

Source: https://millionrounds.com/workflow/convert-newsletters-into-ai-podcasts-with-openai (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Content](https://millionrounds.com/workflows?category=Content#library)

# Convert newsletters into AI podcasts with OpenAI

Started by an arriving email, and works across Gmail. It hands the judgement calls to OpenAI. 16 steps, 1 branch, 1 loop or waits: a working afternoon to understand properly.

Medium Calls a model: OpenAI

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fconvert-newsletters-into-ai-podcasts-with-openai)

**16 steps** Medium: a working afternoon

**1** Branch: places the flow splits

**1** Loop or waits

**1** Service it connects to

## The flow

Starts it 1 Model 1 Logic 7 Service 7

The steps in the order they run, from what starts it.

- 1 **Get Newsletter** Gmail trigger *Starts it*
- 2 **Generate Dialogue Script** Open Ai *Model*
- 3 **Split script** Code *Logic*
- 4 **Loop Over Items** Split In Batches *Logic*
- 5 **Save Audio Chucks** Read Write File *Service*
- 6 **Function Node – Clean Segment** Code *Logic*
- 7 **Generate `concat_list.txt`** Code *Logic*
- 8 **If** If *Logic*
- 9 **Save concat_list** Read Write File *Service*
- 10 **Function Node – Prepare Text for TTS** Code *Logic*
- 11 **Function Node – Prepare Text for TTS1** Code *Logic*
- 12 **Join audio chucks and delete all files** Execute Command *Service*
- 13 **Function Node – Prepare Text for TTS - Voice 1** Http Request *Service*
- 14 **Function Node – Prepare Text for TTS - Voice 2** Http Request *Service*
- 15 **read final_merged** Read Write File *Service*
- 16 **Send audio** Gmail *Service*

## How it's built

- **Starts on:** An arriving email
- **Steps:** 16, with 1 branch, 1 loop or waits
- **Size:** Medium: a working afternoon
- **Connects to:** Gmail
- **Model:** OpenAI

## Questions

What does it need to run?

An n8n account, plus your own Gmail account, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on an arriving email.

Does it use AI?

Yes. It calls OpenAI. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 16 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

**Before you run it**

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 16 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fconvert-newsletters-into-ai-podcasts-with-openai)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Gmail](https://millionrounds.com/workflows?service=Gmail#library)

## Workflows like it

Also content, with the same services where possible, closest in size first.

- [**AI-powered sustainability newsletter for marketing with Gmail** 16 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/ai-powered-sustainability-newsletter-for-marketing-with-gmai)
- [**Automated social media content creation with OpenAI** 16 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/automated-social-media-content-creation-with-openai)
- [**Blog-to-Avatar Video Creator & Multi-Platform Auto-Poster** 16 steps · calls a model · Gmail](https://millionrounds.com/workflow/blog-to-avatar-video-creator-and-multi-platform-auto-poster)
- [**Clean Gmail social, promotions and updates with OpenRouter** 16 steps · calls a model · Gmail](https://millionrounds.com/workflow/clean-gmail-social-promotions-and-updates-with-openrouter)
- [**Daily podcast summary with OpenAI and Gmail** 16 steps · calls a model · Gmail](https://millionrounds.com/workflow/daily-podcast-summary-with-openai-and-gmail)
- [**Generate pain-driven content ideas from market signals** 16 steps · calls a model · ClickUp, Gmail](https://millionrounds.com/workflow/generate-pain-driven-content-ideas-from-market-signals)