How to Auto‑Publish New PDFs as Private, Commute‑Ready Audio Episodes
Lead
Automate new PDFs so you can listen on the commute. Pick a cloud path (enterprise zero‑retention TTS + hosting) or a fully local path (on‑device OCR/TTS + static RSS). I give a compact, repeatable pipeline and the exact privacy checkpoints to use.
What You Need
- A watched folder (Dropbox, Google Drive, or local directory) that receives PDFs.
- A TTS option:
- Cloud with zero‑retention (enterprise; ElevenLabs supports an API Zero Retention Mode) see ElevenLabs.
- Local open‑source TTS (Coqui TTS) for on‑device audio see Coqui TTS on GitHub.
- A place to host episodes and serve an RSS feed (podcast host or static hosting; hosts auto‑generate RSS feeds) see Transistor guide.
- An automation layer: Zapier/Make or a small watcher script that uploads audio and updates the RSS.
Step‑by‑Step
Two repeatable pipelines: Cloud (fast, low‑ops) and Local (private, more control).
1) Cloud-first (fast, lower maintenance)
- Watch: Use Zapier or Make to trigger on a new PDF in a folder. The automation picks the file and extracts text (or sends the PDF for OCR where needed).
- TTS: Send the extracted text to an enterprise TTS endpoint that supports zero‑retention. ElevenLabs documents a Zero Retention Mode that deletes most request/response data immediately and is enabled for select enterprise customers via API flags (for TTS endpoints set enable_logging=false) ElevenLabs Zero Retention Mode.
- Package: Convert the TTS output into an MP3 and add a simple show note describing the source PDF (title, author, page range).
- Publish: Upload the MP3 to a podcast host; the host updates your RSS feed automatically so episode delivery works to podcast apps Transistor: How to create a podcast RSS feed.
- Verify: Confirm the automation replaced any transient logs and that the TTS request history shows no retained content (enterprise zero‑retention should leave no request entries per vendor docs).
2) Local-first (maximum privacy, single machine or trusted server)
- Watch: Run a small daemon or a launchd/systemd job that watches a local directory for PDFs.
- Extract: For born‑digital PDFs use a text extractor; for scans run local OCR (Tesseract) to get text.
- TTS: Synthesize audio locally with Coqui TTS (open source) so nothing leaves your machine; Coqui’s toolkit and examples live on GitHub and run in environments you control Coqui TTS.
- Chaptering: Chop audio per document headings or page ranges into separate files (players read separate episode files reliably). Optionally package as a single file with chapters using an M4B workflow if your players support chapters.
- Publish: For personal delivery, upload produced MP3s to a private podcast host or a static RSS served from S3/GitHub Pages; podcast hosts will create and maintain the RSS metadata for you Transistor RSS guide.
Quick Privacy Checklist (must run for every automation)
- If using a cloud TTS: confirm vendor zero‑retention is available for your plan and is explicitly enabled in the request (ElevenLabs documents enterprise Zero Retention Mode and an enable_logging=false flag) ElevenLabs.
- If you need absolute control: use a local TTS (Coqui) and local OCR so no document text is sent to third parties Coqui TTS.
- Archive policy: design a retention policy for generated audio (automatic deletion after X days) and remove raw extracted text when not needed.
- Legal: for regulated data (health, legal), choose vendors that offer BAAs or treat the conversion as on‑premise processing.
Tips and Pitfalls
- Zero‑Retention is not always a consumer toggle. ElevenLabs’ Zero Retention Mode is an enterprise feature and may be restricted on some accounts; verify vendor access before building workflows ElevenLabs Zero Retention Mode.
- OCR matters. Scanned PDFs need reliable OCR; bad OCR produces poor audio. If accuracy is critical, run a small sample first and check errors.
- Chaptering is fragile across players. The most compatible path is per‑heading MP3 files and an RSS item per chapter or an M4B with embedded chapter metadata if you control the player set.
- Hosting vs. private distribution: public podcast hosts simplify RSS but make episodes discoverable; private podcast hosting or authenticated feeds are better for internal documents.
Short example architectures (high level)
- Minimal: Folder → Zapier watch → ElevenLabs TTS (zero‑retention) → Transistor upload → RSS updated.
- Private self‑hosted: Folder watcher → local OCR/TTS (Coqui) → S3 bucket with static RSS file → private podcast player.
FAQ
Can I use ElevenLabs Zero Retention on a regular account?
No. The vendor documents Zero Retention Mode as an enterprise feature available to select customers; it can be restricted and must be enabled via API parameters (ElevenLabs Zero Retention Mode).
What if my PDF is scanned images only?
You need OCR first. Local Tesseract or a cloud OCR step will extract text. Poor OCR yields poor audio; test sample pages first.
Will podcast directories accept automatically generated episodes?
Yes. Podcast hosts generate compliant RSS feeds when you upload MP3s and metadata; directories read the RSS like any other show (Transistor: How to create a podcast RSS feed).
How do I keep episodes private?
Use private podcast hosting or host a private RSS behind authentication. Avoid public hosts if episodes contain sensitive material.