Key Takeaways
Sixty hours of lectures is roughly five hundred thousand words — reading that back takes over thirty hours, so a full transcript of everything isn’t the fix. With three weeks left, triage by what the exam covers, not by which recordings sound best. Transcribe only what matters, then compress those transcripts into your own notes — that compression step is where the learning happens, not the transcription itself.
You’ve got a phone full of recordings from every lecture this term, an exam in three weeks, and a rising suspicion that none of it has actually been listened to yet. That suspicion is correct, and it’s not really the problem. The problem is that the obvious plan — get it all transcribed, then read it — doesn’t scale the way it feels like it should.
The arithmetic below explains why, and the rest of this is a plan that fits inside three weeks instead of one that would need three months.
The arithmetic that explains the panic
Sixty hours of lecture audio, at ordinary speaking speed, comes out to something like five hundred thousand words. Reading that back at a normal reading pace takes well over thirty hours. So transcribing everything doesn’t solve your problem — it just moves the same wall of text from your ears to your eyes, and you still have to get through all of it. You can run the numbers on your own pile of recordings with a speech-time calculator, but the conclusion holds regardless of the exact figure: a complete transcript of the term is not a revision plan. It’s a slightly more searchable version of the same problem.
Triage before you transcribe anything
Three weeks doesn’t leave room to relisten to sixty hours, and it doesn’t leave room to transcribe and properly work through sixty hours either. So decide what’s worth your time before you open the transcription app, not after. The lectures worth transcribing are the ones that cover what the exam actually assesses — not the ones you happened to record cleanly, not the ones from the lecturer you liked best, not the longest ones.
Go through your syllabus or past papers and match topics to lectures. For each one, ask:
- Does this topic appear on the exam, or is it background you already understand from the textbook?
- Is there a slide deck or reading that already covers this, making the recording redundant?
- Did something happen in this lecture — a worked example, a caveat, a definition — that exists nowhere else?
Some recordings from this term will never get opened again. That’s fine. An unused recording has cost you nothing but phone storage.
Relistening is the slow way
If the plan is to play recordings back at higher speed while taking notes live, say plainly that this is the least efficient revision there is. It costs close to the full hour and gives you back almost nothing you didn’t already have sitting in the room the first time. The value of turning a lecture into text is that an hour of listening becomes a page you can scan in a few minutes. If you’re still relistening in week two of three, the plan has already failed.
A transcript is not notes
Once you’ve triaged the list down to lectures that matter, a transcript of each one is a reasonable next step — turning audio into text gets you something searchable and skimmable instead of an hour you have to sit through. But a transcript on its own doesn’t teach you anything. It’s the lecture with the sound turned into letters, nothing more.
The step that actually creates revision value is compressing the transcript down: headings for each topic, definitions pulled out and stated cleanly, worked examples kept intact, and an honest list of what you still can’t explain without looking it up. That compression is where the learning happens, not the transcription. Apps like the SozAI transcription app will generate an automatic summary alongside the transcript, and that’s a reasonable place to start — a skeleton with the shape of the lecture already laid out. Treating that summary as your finished notes skips the part where you actually learn the material. Write the real notes yourself, with the automatic summary as scaffolding, not as the final product.
Where transcripts actually help
Full-text search across a term’s lectures earns its keep on one specific and common problem: the lecturer said something in passing — a definition, a caveat, a phrase that never made it onto a slide — and it exists nowhere else. If you half-remember a sentence and need to find exactly where it was said, searching text beats scrubbing through an hour of audio every time. This is the strongest case for transcribing even the lectures that didn’t make your top-priority list: not to read them cover to cover, but to have them searchable when a specific memory surfaces during revision.
What to expect, realistically
Recording quality decides everything downstream, and there’s no software fix for a bad recording. A phone left on the desk in a large lecture hall picks up more of the room than of the lecturer — coughing, chairs, the person two rows back asking a question. Sitting nearer the front is worth more than any transcription tool you’ll use afterward, because it changes what the microphone actually hears.
Technical vocabulary is where automatic transcription fails hardest. An unfamiliar term produces a confident, wrong word, not a blank or a question mark — it just quietly substitutes something that sounds similar. Anything you plan to rely on for the exam needs a quick check against the slide or the textbook spelling before it goes into your notes, especially names, formulas, and field-specific terms.
One more thing worth knowing before you record anything else this term: universities usually have a policy covering lecture recordings. Recording for your own study is normally fine. Sharing the recording or uploading it somewhere else usually isn’t. Worth a quick check if you’re not sure which category your course falls into.
The three-week version of this
Spend the first few days on triage, not transcription — decide which lectures actually matter before you process a single one. Transcribe only those, check anything technical against a slide, then spend the bulk of your remaining time compressing transcripts into your own notes rather than rereading them. Keep the rest of the recordings around, untranscribed, in case a search turns out to be needed later. That’s a plan that fits three weeks. Transcribing all sixty hours first and figuring out the rest afterward is not.
