Automated Voice-over Workflow for Content Production

The client managed content production through Trello, storing scripts and content in Google Docs attached to cards. Their team needed voice-overs for every piece of content, but the manual process was killing them... download doc, copy text, paste into TTS tool, generate audio, download MP3, upload to Drive, attach to Trello card, update card status. Hours of repetitive work daily across hundreds of cards

They needed complete automation: Trello card with Google Doc attachment goes in, voice-over MP3 comes out and gets attached automatically, card moves to "Completed" list. Zero manual intervention.

Built a N8N workflow orchestrating the entire pipeline-

Monitors Trello board for cards with Google Doc attachments

Extracts Google Doc IDs from attachment URLs

Fetches full document content via Google Docs API

Cleans text removing formatting, special characters, irrelevant content

Reads Trello card labels to determine voice preference

Maps labels to specific ElevenLabs/AI33 voice IDs

Splits long content into optimal chunks (TTS has character limits)

Maintains natural breaks at sentence boundaries

Sends processed text chunks to ElevenLabs TTS API

Handles batch processing for long documents

Implements wait logic for audio generation completion

Retrieves generated MP3 files

Uploads MP3s to designated Google Drive folder

Generates shareable links with proper permissions

Organizes files by project/date structure

Attaches audio files back to original Trello cards

Moves processed cards to "Voice-Over Complete" list

Adds completion timestamp and metadata

Logs successful processing for tracking

Error handling sends failed cards to review queue

N8N nodes configured for complex multi-step automation, conditional branching based on card labels and content length, error handling with retry logic and fallback mechanisms, batch processing managing API rate limits, webhook triggers for real-time card monitoring, and comprehensive logging tracking every step

Completely automated voice-over production pipeline processing 100+ cards weekly without human intervention. Reduced processing time from 15 minutes per card to under 2 minutes automated. Eliminated manual errors in file organization and card updates. Scaled content production 5x without adding team members. Client's production team now focuses on creative work instead of file management

90% time reduction per content piece

100% accuracy in voice assignment and file attachment

Zero manual file management required

Seamless integration with existing Trello workflow

Error recovery handling edge cases automatically