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How to Record Lectures in Gemini Notebook on Mobile

Use Gemini Notebook’s mobile audio recorder and voice chat to capture lectures, then quiz and review from those sources.

September 28, 2026 Yum News

Gemini Notebook (the product formerly called NotebookLM) can now record audio on your phone and treat that clip as a source you can chat with. Google announced the mobile recorder and real-time notebook voice chat on 15 September 2026.

You already add PDFs, photos of handwritten notes, and links. The recorder fills the gap between a live class and those files. Talk after the lecture, or capture the lecture itself when you have permission, then study from the same notebook.

This guide follows Google’s official study-tools post and the product site at notebook.google. Features are still rolling out by plan and language. If a control is missing, check the availability notes at the end before you assume a bug.

What shipped in the September study update

Google described four study changes in the same post:

Real-time spoken chat with a notebook in the Android and iOS apps, in nearly 100 languages.
A new audio recorder in the mobile app for lectures and spoken notes.
Interactive learning overviews under Reports that mix summaries with studio outputs such as infographics, quizzes, and flashcards.
Extra quiz formats (short answer, multiple select, fill in the blank) plus Short Video Overviews of about 60 seconds in more than 80 languages.

Voice chat is grounded in the sources you attach. Google says you can interrupt and ask follow-ups while you speak. That is the reason to record into the notebook instead of a separate voice memo app.

Student taking notes next to a laptop and phone

Who can use voice chat and the recorder

Google published plan and language limits. Treat them as part of setup.

Voice chat with a notebook rolls out first to Google AI Ultra subscribers who are 18 or older. Google says it is coming to Google AI Pro and other users after that Ultra wave. Use the official Android or iOS Gemini Notebook app, not only the web tab.

Audio recorder notes are supported on web and mobile for users (including people under 18) when English is the selected output language in settings. Google posted that the recorder would start the week after the 15 September announcement.

Interactive learning overviews and the new quiz formats were listed as rolling out to all users in the following weeks. Short Video Overviews can be shared with classmates.

U.S. college students can claim one year of Google AI Pro (listed at $19.99 per month) through 31 December 2026, which Google says unlocks 4x higher Gemini Notebook usage versus a non-AI plan. Eligible students in 140+ other markets can claim Google AI Plus, with 2x higher limits. Offers require a valid payment method and convert to a paid plan unless you cancel.

Step 1: Install the app and open one notebook

Install Gemini Notebook for Android or Gemini Notebook for iOS.
Sign in with the Google account that holds your study files.
Open notebook.google on the web if you need to confirm the same notebooks sync.
Create one notebook per course or project. Do not dump every class into a single pile.

Name the notebook after the course code. Add the syllabus PDF and one lecture slide deck before you record. Chat quality tracks source quality.

If you already keep research in a separate notebook, leave that one alone. Lecture audio belongs next to that week’s slides, not next to last semester’s thesis sources.

Step 2: Add slides, photos, and links first

Tap Add a source.
Upload the slide PDF, a Drive file, or a public web page the instructor published.
Photograph handwritten problem sets or whiteboard work when the room lighting is even.
Confirm each file appears in the source list before you hit record.

Google already supported photos of handwritten notes and worksheets. The recorder sits beside those sources. Chat can then cite the recording and the slides in the same answer.

Skip random blog posts that only repeat the textbook. Extra weak sources dilute citations.

For a broader study-tool walkthrough (quizzes, reports, and video overviews), use our Gemini Notebook study tools guide.

Step 3: Record the lecture or a voice memo

Ask the instructor before you record a class. Many rooms ban capture. A hallway recap after class is still useful and avoids that conflict.

Open the course notebook in the mobile app.
Start the audio recorder control Google added for lectures and spoken notes.
Keep the phone on a desk, mic unobstructed, Do Not Disturb on.
Stop the recording when the session ends.
Confirm the clip appears with your other sources and that you can edit it later.

Google says those notes live next to your sources so you can chat, cite, and keep editing. Treat the file as a draft. Trim silence if the product offers an edit path. Add a one-line title such as “Week 4 — recursion recap.”

Do not record passwords, student IDs, or private medical details. A notebook can be shared later.

Close-up of a smartphone recording audio on a desk

Step 4: Talk to the notebook after class

When voice chat is on your account:

Stay in the same notebook.
Start the real-time conversation in the mobile app.
Ask for a walkthrough of one concept from today’s recording plus the slides.
Interrupt when an answer skips a step you need.
End the session when you have a short list of gaps to drill.

Google positions this as source-grounded speech: answers should come from what you attached, not from a general model dump. If a reply has no citation path, ask “Which source supports that?” and discard claims that cannot point back.

Use English output in settings if you need the recorder path Google documented for all ages. Voice chat itself is listed for nearly 100 languages once your plan is in the wave.

Step 5: Turn the same sources into drills

After the recording is in the notebook:

Open Reports and build an interactive learning overview when the control appears. Google says it weaves summaries with studio outputs such as infographics, quizzes, and flashcards.
Generate a quiz. New formats (short answer, multiple select, fill in the blank) were listed as arriving for all users in the weeks after 15 September.
Finish the quiz, then ask chat where you missed items.
Edit weak questions. Google says you can add or change quiz and flashcard items.
Create a Short Video Overview (~60 seconds) if you want a shareable recap in one of the 80+ supported languages.

Keep each overview tied to one week. A 12-week dump produces vague quizzes.

Watch a grounded research pass

This official Grow with Google clip shows how source-grounded notebook research works before you add voice. Use it as a baseline for chat quality, then layer the new recorder on top.

Tips that keep recordings useful

One notebook per course. Mix labs and literature reviews only when they share the same exam.
Record a two-minute self-summary after class if you cannot capture the lecture. That clip still sits next to the slides.
Set output language to English when you need the recorder path Google documented for under-18 accounts.
Watch usage. Google moved Gemini Notebook to flexible compute limits that refresh about every five hours. Heavy video overviews consume more of that budget than a short chat turn.
Share Short Video Overviews, not the raw lecture file, unless the instructor approved a recording.
Cancel a student trial before the billed month if you only needed the September study wave.

Troubleshooting

No recorder button. Confirm you are in the official mobile app, English is the output language, and your build is current. Google timed the recorder for the week after 15 September 2026.

No voice chat. Ultra (18+) was first. Pro and other plans follow. A web-only session will not show the mobile voice control.

Answers ignore the recording. Add the clip as a source and wait until it finishes processing. Ask chat to quote the recording.

Quiz feels generic. Cut extra sources. Point the overview at this week’s slides plus one recap audio file.

Conclusion

The September Gemini Notebook update is a capture-and-drill loop: record or photograph what you studied, speak questions against those files, then quiz the gaps. Voice chat stays plan-gated at first. The recorder is the piece most students can use as soon as the app shows it.

Start with one course notebook, one slide deck, and one five-minute recap. Expand only after citations stay accurate.