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Turn a Semester of Lecture Recordings Into a Study Guide With NotebookLM

Export your lecture recordings, drop them into NotebookLM, click Study Guide. In about 15 minutes you have a textbook-style document cited line-by-line back to your actual audio — plus flashcards and a quiz for the topics you don't know yet. Free. Google account only.

By Akhil Boddu · AfricanTechBro11 May 2026

TL;DR

You sat through the lectures. You don't have time to re-watch them.

NotebookLM accepts audio files as sources. Drop a semester of recordings into one notebook, click Study Guide in the Studio panel, and 30 seconds later you have a textbook-style document — definitions, key concepts, summary questions — with every line cited back to the exact moment in your audio. Then click Flashcards and Quiz from the same panel for active recall on the topics you don't actually know yet.

Free. No credit card. Google account only.

This is the deeper walkthrough that pairs with the carousel and the DM auto-reply. It includes the exact upload prompt and the troubleshooting moves for the three places this workflow usually breaks.

What you need before you start

A Google account (any free one works).
The lecture recordings from your courses, downloaded as MP3 or MP4. If your LMS won't let you download, there's a workaround in Troubleshooting.
About 15 minutes start to finish. Most of it is upload time.

You do not need ChatGPT Plus, Gemini Advanced, or any paid subscription. NotebookLM is free.

The four-step workflow

flowchart LR
  A[Lecture recordings<br/>in your LMS] --> B[Download as MP3 / MP4<br/>into one folder]
  B --> C[Upload to notebooklm.google.com<br/>as Sources]
  C --> D[Click Study Guide<br/>in Studio panel]
  D --> E[Click Flashcards + Quiz<br/>from same panel]
  E --> F[Study what you<br/>don't know yet]

That's the whole thing. Below is the exact click path for each step.

Step 1 — Export your lecture recordings from your LMS

Your university's Learning Management System (Canvas, Moodle, Blackboard, Brightspace — the workflow is the same on all of them) stores every recorded lecture from the semester. Find them and download them as audio or video files into one folder on your laptop.

The exact path depends on your LMS, but the pattern is the same:

Log into your LMS in a browser (not the mobile app — mobile apps usually hide the download button).
Open one of your courses.
Look for a sidebar item called Recordings, Lecture Capture, Media Gallery, Panopto, Zoom Recordings, or My Media depending on which tool your university bolts on.
Click into each recording. Look for a download icon — usually a downward arrow near the share/embed buttons.
Save the file as MP3 (audio only — smaller, uploads faster) or MP4 (video — works fine, NotebookLM only reads the audio track anyway).
Make one folder on your desktop called something like semester-lectures and dump every recording into it.

[SCREENSHOT: LMS recordings list with download icon highlighted]

Tip: MP3 is enough. NotebookLM doesn't watch the video — it transcribes the audio. If your LMS only gives you MP4, that's fine, just expect each file to be 5-10x larger.

Done when: you have one folder on your laptop with every recording from the courses you're studying for. The student in the DMs that triggered this guide had 38 files across two modules.

If your LMS hides the download button

See Troubleshooting — there are three reliable fallbacks (screen recording, audio capture, asking the lecturer directly). Don't give up at this step. The whole workflow falls apart if you can't get the audio out.

Step 2 — Drag the audio into NotebookLM

Go to notebooklm.google.com.
Sign in with the Google account you want to use (your personal one is fine — your university account works too, but personal is easier because it doesn't get revoked when you graduate).
Click Create new notebook (top left, big button).
Name the notebook something useful — [Course Code] Semester 1 2026 works.
In the Sources panel on the left, click Add source.
Drag every audio file from your folder into the upload area. Or click Choose files and select them all at once. NotebookLM accepts audio (MP3, M4A, WAV) and video (MP4) as native source types — no manual transcription step needed.
Wait. NotebookLM transcribes everything in the background. A 60-minute lecture takes about 60-90 seconds to process. While it's working you can keep adding more sources.

[SCREENSHOT: NotebookLM Sources panel with audio files uploading]

Watch out: the free tier currently allows up to 50 sources per notebook and source files up to ~200MB each. A standard 60-minute audio-only MP3 is around 50-60MB, so you can fit a full semester easily. If you're hitting limits, see Troubleshooting.

Done when: every recording shows in the Sources panel with a checkmark, and clicking one shows the auto-generated summary on the right.

Most students don't know NotebookLM accepts audio. They think it's a PDF chatbot. It isn't. Audio is a first-class source type, and every transcription is timestamped — every line NotebookLM ever quotes back to you links to the exact second in the original recording it came from.

Step 3 — Click Study Guide in the Studio panel

The Studio panel is on the right side of the screen. It has six built-in generators: Audio Overview, Briefing Doc, FAQ, Study Guide, Timeline, Mind Map.

You want Study Guide.

Make sure every lecture recording you want covered has its checkbox ticked in the Sources panel on the left. (Tip: there's a "select all" checkbox at the top of the Sources list.)
In the Studio panel on the right, click Study Guide.
NotebookLM reads every selected recording, structures the semester into sections, and outputs a textbook-style document with:
- Definitions of the key terms your lecturer used.
- Key concepts grouped by topic.
- Worked examples where they came up in lectures.
- Summary questions at the end of each section.
Every claim in the study guide is a clickable citation. Click any of them and NotebookLM jumps you back to the exact moment in the original audio where your lecturer said it.

[SCREENSHOT: Studio panel with Study Guide button + generated output preview]

The exact upload prompt (this is what gets DM'd)

Once the Study Guide is generated, you can also use the chat box at the bottom of the notebook to ask focused questions. Here's the prompt that turns the generic study guide into one structured around your specific exam:

You are my tutor for [COURSE NAME].

I have an exam on [DATE]. The exam covers [LIST TOPICS].

From the lecture recordings I uploaded, build me a study sheet
that covers ONLY those topics. For each topic:

1. The definition my lecturer actually used (cite the recording).
2. The 3 most important sub-points my lecturer emphasised.
3. The worked example (if any) my lecturer walked through.
4. The kind of question my lecturer hinted would be on the exam.

If you don't have evidence in the audio for any of these,
say "not covered in the recordings" — do not invent.

Paste it. Wait. Read what comes back.

Why this prompt works: the explicit "do not invent" clause keeps NotebookLM grounded in the audio — without it, the model sometimes pads gaps with general knowledge. The exam-topic list narrows the output to what matters in the next 4 days, not the whole semester.

Done when: you have a structured document that reads like a textbook chapter written from your lecturer's actual words, with citations on every line.

Step 4 — Generate flashcards and a quiz from the same panel

Back in the Studio panel on the right:

Click Flashcards. NotebookLM generates a deck of question-answer cards built from your lecture audio — no Quizlet user uploaded these three years ago, your lecturer did, last week.
Click Quiz. NotebookLM generates a multiple-choice and short-answer test that probes the same content.

[SCREENSHOT: Studio panel showing Flashcards + Quiz generated decks]

Use them like this:

Flashcards are for active recall on the topics you barely remember. Run through the deck once, mark anything you got wrong, run through the wrong ones again the next day.
Quiz is for finding what you don't know yet — the gaps the study guide makes invisible. If you can read the study guide and nod along but still bomb the quiz, that's the signal: you don't actually know it, you only recognised it.

The quiz finds your weak spots. The flashcards close them.

Troubleshooting

Your LMS hides the download button

Some universities lock the download icon on lecture recordings. Three workarounds, in order of effort:

Use the browser, not the mobile app. Mobile apps strip the download button about half the time. The desktop browser is more permissive.
Screen record the playback once. Use QuickTime (Mac), Xbox Game Bar (Windows), or OBS. Play the lecture at 1x in a small window. You only need the audio track — NotebookLM doesn't care about video quality. Save as MP4, upload normally.
Email the lecturer. "Hi [Name], I'd like to revise from the recordings of the [Course] lectures — is there a way to download them? My internet at home isn't reliable enough to stream them." Most lecturers will either send you the file directly or point you at a downloadable copy in the LMS you missed.

Avoid screen-recording tools that route through a third-party server (cloud "screen capture" sites) — your lecture audio is technically university IP, keep the file on your laptop.

NotebookLM rejects a file

Three common reasons NotebookLM rejects an upload:

File too large. The current per-source ceiling is around 200MB. If a recording is bigger than that, convert it from MP4 to MP3 (audio only) using a free tool like Audacity or ffmpeg. A 90-minute lecture as MP3 is usually under 80MB.
Unsupported format. NotebookLM accepts MP3, M4A, WAV, MP4. If your LMS exports something weirder (.wma, .ogg, proprietary streaming wrapper), convert to MP3 first.
Source limit hit. Free notebooks cap at 50 sources. If you have 60 recordings, either split into two notebooks (one per module — usually cleaner anyway) or merge several short recordings into one file using ffmpeg before uploading.

If the upload fails silently (no error, just doesn't appear in the Sources panel), refresh the page. Browser memory issues sometimes drop the upload mid-stream — refreshing usually fixes it.

Study Guide misses a topic you know was in the lectures

NotebookLM's auto-generated Study Guide groups content by what came up most often. If a topic was only covered briefly — one slide, one example — it can get skipped.

Fix it directly:

In the chat box at the bottom of the notebook, type: Add a section to the study guide on [TOPIC NAME]. Pull only from the audio sources, cite the exact recording and timestamp.
NotebookLM writes a new section grounded in the recording where you covered it.
If it returns "not covered in the recordings", it isn't — go check the relevant lecture and re-upload if you missed one, or accept that your lecturer didn't actually teach it and move on.

The citation-back-to-audio is the safety net. If the model can't point at a timestamp, the claim doesn't make it into your study notes. That's the whole point of using NotebookLM over ChatGPT for this — no hallucinated facts your lecturer never said.

What's next

Build the notebook this week, before exams. The upload alone takes 20 minutes — don't leave it for the morning of.
Re-run the prompt in Step 3 with a different topic list for each exam. One notebook per module is cleaner than one mega-notebook.
After the exam, keep the notebook. Next semester's revision starts here.

This guide powers the Comment LECTURES CTA on @africantechbro.ai. If a friend is in the same exam-week hole, send them the post — the carousel is the 60-second version of this workflow, this guide is the full one.

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