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How to Build an Automated Podcast Summarization and Insight Extraction System

Create a custom, terminal-based tool to automatically download, transcribe, clean, and summarize your favorite podcasts. This system extracts key insights, actionable quotes, and company mentions, turning audio content into a structured, readable format.

From How I AI

How I AI: How Tomasz Tunguz digests 36 weekly podcasts without spending 36 hours listening

with Claire Vo

How to Build an Automated Podcast Summarization and Insight Extraction System

Step-by-Step Guide

1

Download and Transcribe Podcasts

Set up a script that automatically downloads the latest episodes of your target podcasts. Use a tool like ffmpeg to handle the audio files and a local transcription model like Nvidia's Parakeet (run on a Mac) or OpenAI's Whisper for fast and accurate audio-to-text conversion.

Pro Tip: Running transcription models locally, like Parakeet, can offer better performance and privacy compared to cloud-based services.
2

Clean the Raw Transcripts

The initial transcription will contain filler words and conversational tics. Use a local LLM like Gemma 3 (via Ollama) to clean up the text while preserving all important content and technical details.

Prompt:
You're a transcript editor. Clean up this podcast while preserving all the content. Keep the same length, remove the ums and the ahs, preserve all technical conversations.
3

Orchestrate and Store Data

Create a main orchestrator script to manage the daily processing workflow. Store the cleaned transcripts in a local database like DuckDB to keep a persistent record and easily track which episodes have already been processed.

Pro Tip: Using a simple, local database like DuckDB avoids the complexity of setting up a larger database server for a personal project.
4

Generate Structured Summaries

Feed the cleaned transcripts into a powerful LLM to generate a detailed, structured summary. The goal is to extract the most valuable information in a consistent format.

5

Define the Summary Structure

Prompt the LLM to structure its output with specific sections to ensure consistency and usefulness. Include fields like: Host and Guest, Comprehensive Summary, Key Topics and Themes, Actionable Quotes, Investment Theses, Noteworthy Observations, and Company Mentions.

6

Extract Company Mentions

Instead of relying on traditional Named Entity Recognition (NER) libraries, use the large language model to identify and list any startups or established companies mentioned in the podcast. LLMs often perform this task more accurately with less pre-processing.

Pro Tip: The list of company mentions can be fed into a personal CRM or research database for further investigation.

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