# How to download a NotebookLM Audio Overview > Generate an Audio Overview from the Kortex Workspace with your own style, depth and instructions, then listen or download it as an .mp4. https://www.kortex-notebooklm.com/tutorials/how-to-generate-notebooklm-audio-overviews-from-the-workspace 1. [Tutorials](/tutorials) 2. How to generate and download a NotebookLM Audio Overview # How to generate and download a NotebookLM (Gemini Notebook) Audio Overview 3 minutes 7 steps Updated November 5, 2026 ## Quick answer Open the Kortex Workspace and find the notebook's row in the Notebooks table. Click Generate Audio. Choose a style, depth, sources and language. Add instructions if you want, and start. When it is done, click Listen to play it. Or click Download audio overview to save an .mp4 file. ## Watch it first How to generate and download a NotebookLM (Gemini Notebook) Audio Overview Read the transcript Here's how to make an Audio Overview for Gemini Notebook, formerly NotebookLM, from the Kortex Workspace, and save it as a file. Open the Kortex Workspace. The Notebooks table has an Audio Overview column. A row shows Generate Audio if the notebook has no audio yet. Click Generate Audio, and the Generate Audio Overview window opens. The notebook needs at least one source. Pick Deep Dive, Brief, Critique or Debate. Set the Depth to Short or Standard. Deep Dive also has In-Depth. Then tick the sources to use. Choose the language. Under Instructions, tell the hosts what to focus on. Then click Generate Audio. The row shows Generating while Gemini Notebook makes the audio. Activity, in the top bar, lists it too. When it's done, open the row's audio and click Listen to play it. To save it, tick it and click Download. You get an M P 4 file. Add to Podcast puts it in a private feed you can follow in a podcast app. Make an Audio Overview. Play it, or keep it. ## What you need - The [Kortex extension](https://chromewebstore.google.com/detail/kortex/hdapplggdhndkblofffknpmnnnnbncbn) in Chrome, Edge or Brave, and signed in - A notebook in Gemini Notebook (formerly NotebookLM) with at least one source ## On this page 1. [Open the Notebooks table](#step-1) 2. [Click Generate Audio](#step-2) 3. [Choose style, depth and sources](#step-3) 4. [Pick a language and add instructions](#step-4) 5. [Wait for it to finish](#step-5) 6. [Listen or download](#step-6) 7. [Send it to a podcast, if you want](#step-7) 8. [If it doesn’t work](#trouble) 9. [Questions](#faq) 1. ## Open the Notebooks table Open the Kortex Workspace. The **Notebooks** table has an **Audio Overview** column. A row shows **Generate Audio** if the notebook has no audio yet. [![The Notebooks table in the Kortex Workspace: sources, tags, collections, dates and an Audio Overview column with a Generate Audio button on each row.](/media/features/all-notebooks.webp)](/media/features/all-notebooks.webp) Every notebook in one table. 2. ## Click Generate Audio A **Generate Audio Overview** window opens. A notebook with no sources cannot make audio, so add at least one source first. 3. ## Choose style, depth and sources Pick **Deep Dive**, **Brief**, **Critique** or **Debate**. Set **Depth** to Short or Standard. Deep Dive also has In-Depth. Under **Sources**, tick the ones to use. 4. ## Pick a language and add instructions Choose the language. Under **Instructions (Optional)**, tell the hosts what to focus on, such as the methods section. 5. ## Wait for it to finish The row shows Generating... while Gemini Notebook makes the audio. **Activity** in the top bar lists it too. 6. ## Listen or download Click **Listen** to play the audio. Click **Download audio overview** to save it. The file is an .mp4. 7. ## Send it to a podcast, if you want Click **Add to podcast** to put the Audio Overview in a private feed. You can follow the feed in a podcast app. ## If it doesn’t work Generate Audio does nothing, or generation fails Gemini Notebook has daily limits on Audio Overviews. Kortex cannot raise them. Try again after the limit resets, or check the Google account the notebook belongs to. It says the notebook has no sources Add at least one source before generating audio. Audio Overviews come from a notebook's sources. I wanted an mp3 Downloads are .mp4 files. Most players open them. A video or audio converter can change the file to another format. The audio is about the wrong things Generate it again with fewer sources ticked. Use Instructions (Optional) to name what to cover. ## Questions people ask Something we missed? [Ask us](#contact). ### Does Kortex make the audio itself? No. Kortex asks Gemini Notebook to make it, using your own Google session. Google's own limits on Audio Overviews still apply. ### What file format is the download? An .mp4 file. Most players open it. A converter can change it to another format. ### Can I change the language? Yes. The Generate Audio Overview window has a language choice. ### Can I generate audio for every notebook with a tag? Yes. An [automation rule](/features/automation-rules) has a Generate audio action. It can run when a notebook is tagged or filed. ## Keep going [Audio Overviews from the Workspace Generate, play and download an Audio Overview from any notebook row. Add your own instructions.](/features/audio-overviews) ### More tutorials - [How to listen to NotebookLM Audio Overviews as a podcast](/tutorials/how-to-listen-to-notebooklm-audio-overviews-as-a-podcast) - [How to add notes to ChatGPT conversations](/tutorials/how-to-add-notes-to-chatgpt-conversations) - [How to add YouTube videos and playlists to NotebookLM](/tutorials/how-to-add-youtube-videos-to-notebooklm) - [How to archive ChatGPT chats and find them again](/tutorials/how-to-archive-chats-in-chatgpt) [All tutorials](/tutorials) ## Do it on your own notebooks. Install the Kortex extension and follow these steps on a notebook you already have. [Add to Chrome](https://chromewebstore.google.com/detail/kortex/hdapplggdhndkblofffknpmnnnnbncbn) 100,000+ users, rated 4.5 on the Chrome Web Store.