10:29 AM PDT · September 3, 2025
Google’s AI note-taking and investigation adjunct NotebookLM now lets users customize nan reside of their Audio Overviews, which are podcasts pinch AI virtual hosts that summarize and talk documents shared pinch NotebookLM, specified arsenic people readings aliases ineligible briefs.
When generating an Audio Overview, users tin now take whether they want their AI podcasts to beryllium formatted arsenic a “Deep Dive,” “Brief,” “Critique,” aliases “Debate.”
A Deep Dive features conversational dialogues wherever 2 AI hosts unpack nan taxable pinch extent and questions. A Brief is simply a bite-sized overview that’s designed to thief you quickly grasp nan halfway ideas from your sources.
A Critique features a reappraisal of your sources and constructive feedback to thief you improve, while a Debate includes 2 AI hosts offering different perspectives connected your sources.

Each of nan different formats lets you customize really agelong aliases short you want nan AI podcast to be.
In summation to customizable tones, Google is besides bringing a highly requested characteristic to NotebookLM, which is nan summation of caller voices for nan AI podcasts.
The motorboat comes arsenic Google has been building retired NotebookLM complete nan past fewer months. A fewer weeks ago, nan tech elephantine rolled retired Video Overviews, which let users to turn dense multimedia, specified arsenic earthy notes, PDFs, and images, into digestible ocular presentations.
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NotebookLM precocious besides sewage access to a bid of featured notebooks from various authors, publications, researchers, and nonprofits that let users to research a wide array of topics. And successful May, Google officially rolled retired standalone NotebookLM apps for Android and iOS.
The caller formats for NotebookLM are launching successful each languages and should beryllium disposable to each users this week, Google says.
Aisha is simply a user news newsman astatine TechCrunch. Prior to joining nan publication successful 2021, she was a telecom newsman astatine MobileSyrup. Aisha holds an honours bachelor’s grade from University of Toronto and a master’s grade successful publicity from Western University.
You tin interaction aliases verify outreach from Aisha by emailing aisha@techcrunch.com aliases via encrypted connection astatine aisha_malik.01 connected Signal.