Google’s NotebookLM has received an update that enhances its Audio Overview feature with three new formats: Brief, Critique, and Debate, in addition to the existing Deep Dive option.
The update, announced via NotebookLM’s official X account, is currently rolling out to users, with a demonstration video showcasing the desktop application’s ability to transition between the four formats. The AI voices in the video dynamically adjust their tone to suit each style, illustrating the versatility of the new feature.
The new formats offer distinct approaches to content summarization. Deep Dive remains the comprehensive, long-form option, while Brief condenses information into a concise 1-to-2-minute summary. Critique presents the material as expert feedback, offering analytical insights. Debate stages a simulated discussion, highlighting opposing viewpoints within the text.
This enhancement builds upon Google’s recent efforts to expand NotebookLM’s Audio and Video Overview capabilities. The tool was recently upgraded to support over 80 non-English languages, ensuring detailed summarization parity with its English counterpart. This move underscores Google’s commitment to refining and developing NotebookLM as its user base grows.
The addition of Brief, Critique, and Debate formats aims to provide users with diverse and engaging ways to understand and interact with their notes, further solidifying NotebookLM’s position as a practical AI tool.




