# Generate two-host PDF podcasts with OpenAI and Smallest AI: n8n workflow

> Started by someone submitting a form, and works across Gmail. It hands the judgement calls to OpenAI.

Source: https://millionrounds.com/workflow/generate-two-host-pdf-podcasts-with-openai-and-smallest-ai (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)

# Generate two-host PDF podcasts with OpenAI and Smallest AI

Started by someone submitting a form, and works across Gmail. It hands the judgement calls to OpenAI. 13 steps, 1 branch: a working afternoon to understand properly.

Medium Calls a model: OpenAI

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fgenerate-two-host-pdf-podcasts-with-openai-and-smallest-ai)

**13 steps** Medium: a working afternoon

**1** Branch: places the flow splits

**0** Loops or waits

**1** Service it connects to

## The flow

Starts it 1 Model 1 Logic 7 Service 4

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

- 1 **When Form Submitted** Form trigger *Starts it*
- 2 **Extract Data from File** Extract From File *Service*
- 3 **Generate Podcast Script (GPT-5)** Open Ai *Model*
- 4 **Split Script Into Turns** Split Out *Logic*
- 5 **Route by Host** Switch *Logic*
- 6 **Synthesize Host A Audio** Smallestai *Service*
- 7 **Synthesize Host B Audio** Smallestai *Service*
- 8 **Preserve Host A Order** Set *Logic*
- 9 **Preserve Host B Order** Set *Logic*
- 10 **Merge Both Hosts** Merge *Logic*
- 11 **Sort by Conversational Order** Sort *Logic*
- 12 **Concatenate WAV Audio** Code *Logic*
- 13 **Email Podcast to User** Gmail *Service*

## How it's built

- **Starts on:** Someone submitting a form
- **Steps:** 13, with 1 branch
- **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 someone submitting a form.

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. 13 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 13 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%2Fgenerate-two-host-pdf-podcasts-with-openai-and-smallest-ai)
- **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-generated LinkedIn posts with OpenAI and Google Sheets** 13 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/ai-generated-linkedin-posts-with-openai-and-google-sheets)
- [**Analyze social media sentiment & trends from Twitter & Facebook** 13 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/analyze-social-media-sentiment-and-trends-from-twitter-and-f)
- [**Analyze suspicious email contents with OpenAI** 13 steps · calls a model · Gmail, Jira](https://millionrounds.com/workflow/analyze-suspicious-email-contents-with-openai)
- [**Automate blog content creation with OpenAI and Perplexity** 13 steps · calls a model · Gmail](https://millionrounds.com/workflow/automate-blog-content-creation-with-openai-and-perplexity)
- [**Benchmark content safety guardrails with OpenAI and Gmail** 13 steps · calls a model · Gmail](https://millionrounds.com/workflow/benchmark-content-safety-guardrails-with-openai-and-gmail)
- [**Classify AI news from RSS and create LinkedIn carousels** 13 steps · calls a model · Gmail, RSS](https://millionrounds.com/workflow/classify-ai-news-from-rss-and-create-linkedin-carousels)