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Google’s NotebookLM now lets you customize the tone of its AI podcasts Aisha Malik AM PDT · September 3, 2025 Google’s AI note-taking and research assistant NotebookLM now lets users customize the tone of their Audio Overviews, which are podcasts with AI virtual hosts that summarize and discuss documents shared with NotebookLM, such as course readings or legal briefs.

When generating an Audio Overview, users can now choose whether they want their AI podcasts to be formatted as a “Deep Dive,” “Brief,” “Critique,” or “Debate.”

A Deep Dive features conversational dialogues where two AI hosts unpack the topic with depth and questions. A Brief is a bite-sized overview that’s designed to help you quickly grasp the core ideas from your

A Critique features a review of your

Each of the different formats lets you customize how long or short you want the AI podcast to be.

In addition to customizable tones, Google is also bringing a highly requested feature to NotebookLM, which is the addition of new voices for the AI podcasts.

The launch comes as Google has been building out NotebookLM over the past few months. A few weeks ago, the tech giant rolled out Video Overviews, which allow users to turn dense multimedia, such as raw notes, PDFs, and images, into digestible visual presentations.

Techcrunch event Tech and VC heavyweights join the Disrupt 2025 agenda Netflix, ElevenLabs, Wayve, Sequoia Capital, Elad Gil — just a few of the heavy hitters joining the Disrupt 2025 agenda. They’re here to deliver the insights that fuel startup growth and sharpen your edge. Don’t miss the 20th anniversary of TechCrunch Disrupt, and a chance to learn from the top voices in tech — grab your ticket now and save up to $600+ before prices rise. Tech and VC heavyweights join the Disrupt 2025 agenda Netflix, ElevenLabs, Wayve, Sequoia Capital — just a few of the heavy hitters joining the Disrupt 2025 agenda. They’re here to deliver the insights that fuel startup growth and sharpen your edge. Don’t miss the 20th anniversary of TechCrunch Disrupt, and a chance to learn from the top voices in tech — grab your ticket now and save up to $675 before prices rise. San Francisco | October 27-29, 2025 REGISTER NOW NotebookLM recently also got access to a series of featured notebooks from various

The new formats for NotebookLM are launching in all languages and should be available to all users this week, Google says.

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