NotebookLM is flirting with long lectures and British accentsGoogle's excellent app could soon turn your notes into long-form lectures, while also teasing British English narration.

NotebookLM is flirting with long lectures and British accents

Credit: Tushar Mehta / Android Authority

TL;DR

• Google is testing a new lectures Audio Overview style in NotebookLM that can turn notes into a single-host, 30-minute explanation.
• The Lecture format would sit alongside existing modes, such as Deep Dive, Brief, Critique, and Debate.
• NotebookLM is also teasing British English narration voices planned for 2026, with an early easter egg already live in a Featured Notebook.

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As much as we admire NotebookLM, Google isn’t resting on its laurels and continues to tweak the AI app. The latest feature in testing looks to be a new “Lecture” format for Audio Overviews in NotebookLM, and there may also be a British twist on the way.

Instead of two AI hosts chatting things through, Lecture appears to stick to a single narrator delivering a continuous, lecture-style explanation that can run for up to half an hour. According to TestingCatalog, which appears to have enabled the feature in a teardown of the app, the Lecture option shows up alongside existing Audio Overview formats, such as Deep Dive, Brief, Critique, and Debate.

Google's excellent app could soon turn your notes into long-form lectures, while also teasing British English narration.Matt Horne2025-12-24T10:08:35.000Z{}