NotebookLM users are hearing a mysterious third voice in Audio Overviews, and it might not be a bug

Fingers crossed it’s a new voice, not a new problem.

Jun 19, 2025 - 16:17
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NotebookLM users are hearing a mysterious third voice in Audio Overviews, and it might not be a bug

What makes Google's AI-powered research assistant, NotebookLM, stand out from the hundreds of AI tools out there is its Audio Overview feature. If you aren't familiar with it, the feature can transform sources into "deep dive discussions," where two virtual hosts discuss sources in an engaging manner.