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Google NotebookLM Adds Lecture Mode With Up to 30-Minute Single-Voice Lessons

The feature is built for passive, class-style listening that turns uploaded sources into structured audio.

Overview

  • Lecture mode generates a continuous, single-voice explanation of a topic drawn from user-provided materials.
  • Listeners can choose Short, Default, or Long durations, with the Long option running roughly 30 minutes.
  • Reviews describe a calm, pedagogical delivery meant for background learning rather than interactive dialogue.
  • The update marks a shift from NotebookLM’s earlier multi-voice, podcast-style conversations that users could join.
  • The Notebook team has teased a planned British-accent voice on X, and early anecdotes highlight uses from study sessions to health reviews, job applications, and legal preparation.