NotebookLM’s New Audio Overviews Can Have AI Voices Debate Based on Your Notes
Notebooklm, a research assistant on AI propelled by Gemini, will soon generate a debate or criticize your research and notes in its audio overview function. Three new audio summary formats announced on Tuesday – called brief, criticism and debate – will offer users more options and add more flavor to what is already one of the best IA tools in Google.
The audio overview function was a catalyst for the popularity of Notebooklm as a note -taking tool that only uses the sources you provide and makes information more digestible. Notebooklm is multimodal, so you can create an audio overview of the podcast type or generate a study guide if it’s more your style.
Although audio previews are new during the demo for the first time in 2024, Google has since incorporated it into more of its products. Google also recently introduced the first video view format video. This is what is new.
Reference of new audio overview formats:
(Default) Deep Dive: an in -depth examination of your sources
In short: 1-2 minutes, seen the size of a bite
Critality: an expert review, offering constructive comments on your equipment
Debate: a thoughtful debate between two hosts pic.twitter.com/m3z3yasmyf– Notebooklm (@NoteBooklm) September 2, 2025
New overview of audio: in short, criticism, debate
During the first introduction, audio previews provided a “deep dive” on your sources, reducing fat and focusing on a general overview of the subject.
Later, Google presented a way to personalize your audio glimps so that you can focus on the equipment that counts most for you. You can also customize the length of an overview.
Although the default option is always the typical deep dive, three new options – brief, criticism and debates – are now deployed to users.
- Brief: Preview of the size of the bite from 1 to 2 minutes
- Critique: Constructive feedback on materials
- Debate: two hosts engaging in a thoughtful debate
Although I have not been able to test the new types of overview, I imagine that the criticism and debate formats could be useful for learning different perspectives that you may not have considered before.
The introduction of different audio overview formats is a solid upgrade, especially if you are looking for other approaches to a subject. The new formats also open the doors for even more options in the future, allowing Notebooklm to become a more nuanced learning tool.
