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NotebookLM Gets Customizable AI Podcast Formats & New Voices

AI Google NotebookLM Audio Overviews TechCrunch Disrupt AI Podcasts Innovation
September 03, 2025
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Article Summary

Google’s NotebookLM has unveiled a significant upgrade to its AI note-taking and research assistant, introducing highly customizable formats for its Audio Overviews. Users can now choose between a ‘Deep Dive’ (conversational dialogue), ‘Brief’ (bite-sized overview), ‘Critique’ (review with feedback), or ‘Debate’ format when generating podcasts summarizing documents like course readings or legal briefs. This provides a level of personalization previously unavailable. In addition, Google is adding new AI voices to the Audio Overviews, expanding the functionality. This launch follows the recent rollout of Video Overviews, which transforms multimedia into digestible presentations. NotebookLM also recently gained access to featured notebooks from various sources and offers standalone apps for Android and iOS. Google states the new formats will be available in all languages this week.

Key Points

  • NotebookLM now supports four distinct Audio Overview formats: Deep Dive, Brief, Critique, and Debate.
  • Users can select the desired length and style of their AI-generated podcasts.
  • Google is introducing new AI voices for the Audio Overviews, enhancing the user experience.

Why It Matters

This development highlights Google's continued investment in making AI tools more accessible and useful for professional research and learning. The ability to customize the tone and format of AI-generated summaries directly addresses a key need for users who want to optimize information consumption and integrate AI assistance into their workflows. This feature makes NotebookLM a more versatile and valuable tool for students, researchers, and professionals alike, boosting productivity and offering greater control over AI-driven content.

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