You just finished a 45-minute client interview. The recording is on your phone, the good quotes are somewhere in the middle, and typing it out yourself would eat the rest of your afternoon.
Here is how to transcribe audio with AI: first check whether the tool you recorded in already made a transcript (Google Meet, Word and the iPhone Voice Memos app often do). If not, upload the file to Word for the web, ChatGPT or Gemini, tell it what you want (word for word, speaker labels, timestamps), and give it the names and jargon it will hear. Then spend ten minutes checking names, numbers and every quote you plan to use against the audio. The AI does the typing. You check what matters.
Below: which route fits your recording, a prompt you can copy, how to get a cleaner transcript, the check that keeps a wrong quote out of your report, and what to do with the text once you have it.
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Pick the right route for your recording
There is no single best transcription tool. The right one depends on where the audio lives and what you already pay for. Start at the top of this list and stop at the first one that fits.
1. The meeting already happened in Google Meet
Look for an existing transcript before you upload anything. Google Meet can transcribe a meeting while it runs (Meeting tools, then Transcribe). The transcript is saved in the organizer’s Google Drive and attached to the Calendar event, and the host gets an email with a link after the call (Google Meet Help, Use Transcripts with Google Meet). Many other meeting tools have a similar transcript setting, so check yours first.
2. It is a voice memo on your iPhone
On a recent iPhone, the Voice Memos app can show a transcript of a recording (the feature is not available in every region or language). Tap the recording, tap the More button, then choose Copy Transcript and paste it wherever you need it (Apple Support, View a Voice Memos transcription). The Notes app can record and transcribe too on iPhone 12 and later; Apple warns that deleting the recording there also deletes its transcript, so add the text to the note first (Apple Support, Record and transcribe audio in Notes).
3. You have Microsoft 365
Word has a Transcribe feature: Home, Dictate dropdown, Transcribe, Upload audio. It takes .wav, .mp4, .m4a and .mp3 files, separates the speakers, and gives you timestamps you can play back while you correct the text. A Microsoft 365 subscription covers up to 300 minutes of uploaded audio per month, and in a browser it works in Edge and Chrome (Microsoft Support, Transcribe your recordings). For an interview, this is often the most comfortable editor of the lot, because you can play and fix each line in the same pane.
4. You use ChatGPT on a paid plan
You can attach an audio file (MP3, M4A, WAV, FLAC and more, up to 512 MB) to a ChatGPT chat and ask for a transcript. Audio uploads are not on the Free plan. OpenAI also says plainly that transcripts may contain errors and speaker identification may be unreliable, so you review important details against the recording (OpenAI Help, Uploading files and audio to ChatGPT). The big plus: in the same chat you can ask follow-up questions about what was said.
5. You use Gemini
The Gemini app accepts audio files too (Add files, then Upload files). On a free account the total audio length per upload is 10 minutes; Google AI Pro or Ultra raises that to 3 hours, and each audio file can be up to 100 MB (Gemini Apps Help, Upload and analyze files). That makes the free version fine for a short voice note, and too small for a full interview.
6. You want to transcribe lots of files automatically
If you get a steady stream of recordings (sales calls, podcast episodes, support voicemails), the OpenAI speech-to-text API can take files up to 25 MB in formats like mp3, m4a and wav. You can pass it a short description of the recording and a list of expected terms to help with names and jargon (OpenAI API docs, File transcription). This needs a developer, or an automation tool such as n8n or Zapier in front of it. Our n8n tutorial for beginners shows how such a flow is put together.
How to transcribe audio with AI in ChatGPT or Gemini, step by step
- Check the file. MP3, M4A or WAV work almost everywhere. If your recording is a video, export the audio track first: ChatGPT refuses files it identifies as video.
- Cut what you do not need. Ten minutes of waiting for people to join is ten minutes of noise for the AI and for you.
- Attach the file and paste a clear instruction. Tell it the format you want, who is speaking, and the words it will stumble on.
- Read the first two minutes against the audio. If the speaker labels are wrong from the start, correct them in a follow-up message before you go further.
- Save the transcript in a document of your own, with the date and the name of the recording at the top.
Here is a prompt you can copy and adjust:
Transcribe this recording word for word. Context: a 40-minute interview between me (Sam, the interviewer) and Lena Hart, operations lead at a logistics company, about how her team plans weekly routes. Rules: - Label each speaker: SAM or LENA. - Start a new paragraph at every change of speaker and add [mm:ss] at the start. - Keep filler words out, but do not shorten or rephrase anything else. - Names and terms you will hear: Lena Hart, RouteMaster, TMS, Q3, Rotterdam depot. - If a passage is unclear, write [unclear mm:ss] instead of guessing.
That last rule matters more than it looks. You would rather see a gap you can fill from the audio than a smooth sentence nobody said.
Get a cleaner transcript before you even upload
Most transcript errors start in the recording, not in the AI. A few habits help a lot:
- Put the microphone close to the people talking. A phone in the middle of a big table hears the air conditioning better than the quiet person at the end.
- One voice at a time. When people talk over each other, every tool struggles to split the speakers. OpenAI’s own help page warns that speaker identification may be unreliable.
- Say names at the start. “This is Sam, talking with Lena from operations” gives the AI and your future self a clear anchor.
- Give it your vocabulary. Product names, client names and abbreviations are where transcripts go wrong. OpenAI’s documentation suggests giving the model context and the terms you expect for exactly this reason (OpenAI API docs). In a chat, a short list in your prompt does the same job.
- Mind the language. All the tools above list a set of supported languages, and OpenAI notes that performance varies by language. If your meeting switches between English and Dutch, say so in the prompt.
Check it before you trust it
AI transcripts read beautifully, which is exactly why mistakes slip through. A wrong word looks just as confident as a right one.
There is research on this. A Cornell-led study of OpenAI’s Whisper model found that while most transcriptions were highly accurate, roughly 1% contained whole phrases or sentences that were not in the audio at all, and these happened more often around longer pauses and silences (Koenecke et al., Careless Whisper, FAccT 2024). That study tested a 2023 model, and tools have changed since, but the lesson holds: the transcript is a draft, the recording is the source.
A ten-minute check that catches the errors that hurt:
- Every quote you will use. Play the exact moment and compare word for word. A quote in a case study or a report has to be what the person said.
- Every number and date. “Fifteen” and “fifty” sound alike. So do many prices.
- Every name. People, companies, products. Search the transcript for each one.
- Any sentence that surprises you. If it does not sound like the speaker, listen. Pay extra attention to the bits after a long silence.
- The speaker labels on decisions. “Who said we would ship on Friday” matters later.
Word makes this easy because each paragraph is linked to its spot in the audio. In ChatGPT or Gemini, the [mm:ss] timestamps from the prompt above do the same job: jump to the time and listen.
Turn the transcript into something useful
A transcript on its own is a wall of text. The real time saving comes when you ask the AI to turn it into the thing you actually need. In the same chat, try:
Using only the transcript above: 1. List every decision, with who made it and the timestamp. 2. List every action item: what, who, by when (write "no date given" if none was said). 3. Give me the 5 strongest quotes from LENA about route planning, word for word, each with its timestamp. Do not add anything that is not in the transcript.
Then go where the work goes next:
- For a meeting, follow our guide to summarize meeting notes with ChatGPT, or turn meeting notes into a report your manager will read.
- For a customer interview, the quotes feed straight into a case study written with AI or into your market research.
- For a recording in another language, transcribe it first in its own language, then translate the document with AI. You keep the original to check against.
- For a quick follow-up after a call, ask for a draft and polish it with our tips to draft reply emails faster.
A worked example
This is an illustration, not a customer story. Say you are a consultant with a 38-minute interview recorded on your phone as an M4A file of about 35 MB.
- Gemini free is out: the limit is 10 minutes of audio.
- The OpenAI API is out unless you split the file: it is over 25 MB.
- ChatGPT on a paid plan takes it in one go (well under 512 MB), and so does Word for the web if your 300 monthly minutes are not used up.
You pick Word because you want to fix lines while listening. You start the upload and answer email while it works. Then you paste the corrected transcript into ChatGPT with the action-item prompt above, check the five quotes against the audio, and your interview notes are done before the end of the day.
Privacy and consent: settle this before you press record
- Ask first. Tell people you are recording and why, at the start of the call. It is basic courtesy, and depending on where you and the other person are, the law may require it. If you are unsure, check with your company’s legal or privacy contact.
- Know where the audio goes. Word stores uploaded recordings in a Transcribed Files folder on your OneDrive, where you can delete them (Microsoft Support). Google Meet saves transcripts in the organizer’s Drive.
- Check your data settings. Every AI tool has its own settings for how your uploads are stored and used. Read them once for the tool you pick, and for confidential client calls use the tool your company has approved.
- Do not upload what you would not email. Health details, salaries and personal data about third parties deserve extra thought, whatever the tool.
Questions people ask about AI transcription
Can ChatGPT transcribe audio for free?
Not by file upload. OpenAI lists audio uploads for paid ChatGPT plans and workspaces only. Free routes that do exist: Voice Memos or Notes on a recent iPhone, Gemini for recordings up to 10 minutes, and a transcript from your meeting tool if your plan includes it.
How long a recording can AI transcribe?
It depends on the tool. ChatGPT takes audio files up to 512 MB, though OpenAI says very long recordings are handled on a best-effort basis and can time out. Gemini allows 10 minutes on a free account and 3 hours on Google AI Pro or Ultra. Word covers 300 uploaded minutes a month on a Microsoft 365 subscription. For longer material, split the file at natural breaks, never in the middle of a sentence.
Can AI tell the speakers apart?
Usually, but not perfectly. Word separates speakers automatically and lets you rename them. In a chat tool, tell it who is in the recording and how to label them, then check the labels on anything that matters, like who agreed to what.
Is an AI transcript accurate enough to quote?
Only after you have checked the quote against the audio. Use the transcript to find the moment fast, then listen to that moment yourself.
What is the difference between transcribing and summarizing?
A transcript is everything that was said, in order. A summary is the AI’s selection. Get the transcript first and keep it: when someone asks “did she really say that?”, the summary cannot answer, the transcript and the recording can.
Start with your next recording
Pick the route that fits what you already have, use the prompt above, and do the ten-minute check. After two or three recordings you will know which tool suits your work, and typing out interviews by hand will feel like something from another decade.
If you need notes during live Zoom or Teams calls rather than a transcript after the fact, compare the best AI note taker for meetings by fit for your stack.
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