How to Record Audio on Your Phone So It Transcribes Well

Why a phone is a capable speech recorder

Phone microphones are designed for voices. They are small, they handle the frequency range of speech well, and recording apps on both iPhone and Android save files in formats that transcription tools accept. What usually lets phone recordings down isn't the hardware but the situation: the phone sits at the far end of a table, buzzes with notifications, rests on a hard surface that picks up every tap, or is held in a hand that keeps moving.

Fix the situation and a phone recording often beats a better recorder used carelessly. This article covers recording new audio; for turning recordings you already have into text, see voice memo to text.

Built-in recording apps and the files they make

iPhone Voice Memos

M4A (AAC); a lossless option exists in Settings

Google Pixel Recorder

records audio and can share it as an audio file

Samsung Voice Recorder

M4A, with modes such as Standard and Interview

Other Android recorders

often M4A; basic or older apps may use 3GP or AMR

Third-party recorder apps

frequently offer WAV, MP3 or M4A with manual settings

The defaults are fine for speech. Compressed AAC at the default quality preserves everything a transcription system uses. A lossless or WAV option is worth choosing only if you plan to edit the audio heavily afterwards, and it uses far more storage.

Some recorders have their own transcription features, which can be handy for a quick read. The audio file is still the asset to keep, because you can transcribe it again, in another language or with another tool, whenever you need to. App names, menus and formats change with operating system updates, so check your phone maker's current help pages.

Where to put the phone

Distance is the single biggest factor. At 20 to 30 centimeters from one speaker, a phone captures a clean, direct voice. At two meters across a meeting room, it captures mostly the room.

• Find the microphone. On most phones the main one is at the bottom edge, near the charging port. Point that edge toward the speaker.
• Put the phone on something soft, such as a folded cloth, a notebook or a mouse pad. A hard table carries the vibration of every cup, pen and elbow straight into the microphone.
• Don't hold it. Hands shift, and every movement is recorded as a rumble or rustle.
• For two people, place it between them, slightly nearer the quieter speaker. For a group, put it in the middle and accept that the far end will be weaker, or use two phones.
• Keep it away from laptops, fans, air vents and windows.
• Outdoors, shield it from wind with your body or a pocket-sized foam cover; wind noise ruins speech quickly, as covered in the wind noise article.

Airplane mode, notifications and interruptions

A phone is a communications device first, and it will interrupt your recording if you let it. An incoming call can pause or end a recording in some apps, and notification sounds can be captured. Mobile radio signals can also cause buzzing in nearby speakers and some wired microphones.

Switch on airplane mode before you start. If you use a Bluetooth or wireless microphone, turn Bluetooth back on after enabling airplane mode, since phones allow that. Turn on Do Not Disturb as well, because some alarms and timers still sound in airplane mode. Check battery and free storage too: an hour of compressed audio is small, but an hour of WAV is large, and a phone that runs out of space mid-interview may lose the file.

Adding a lavalier or external microphone

When the speaker can't be close to the phone, such as a lecturer moving around, a presenter on a stage or an interview while walking, a clip-on lavalier is the fix. Clipped 15 to 20 centimeters below the chin, it hears the voice clearly even in a noisy room.

• Wired lavaliers with a 3.5 mm plug need the right plug type for phones. Phone headset inputs use a four-contact plug, often labeled TRRS; a three-contact TRS plug meant for cameras won't connect the microphone.
• On phones without a headphone jack, use a headphone adapter that supports microphone input, or a lavalier with a USB-C or Lightning connector.
• Wireless clip-on systems with a small receiver that plugs into the phone are convenient for moving speakers.
• Avoid Bluetooth earbuds as a recording microphone. The headset mode they use for calls typically reduces audio quality, which is fine for a call and poor for transcription.

Built-in recorder apps usually switch to an external microphone automatically when it's connected. Do a 10-second test to confirm the sound really comes from the clip-on and not from the phone's own microphone. Choosing among microphone types in general is covered in choosing a microphone for speech.

Example: an interview recorded in a busy market

She clips the lavalier on the shopkeeper's shirt, runs the cable under his apron, switches the phone to airplane mode and Do Not Disturb, and records a short test in Voice Memos. The playback shows the voice well above the crowd. She keeps the phone in her pocket, so there is no handling noise, and asks her questions loudly enough that the lavalier catches them too.

Back at the office, she AirDrops the M4A to her laptop. A transcript costs 23 credits (2.3¢), and she adds an English translated transcript in the same job so her editor can follow the conversation, then checks every quote with the original Spanish audio before publishing.

A recording routine for phones

1. Charge the phone and check that there is enough free storage for the full session.
2. Switch on airplane mode and Do Not Disturb, then re-enable Bluetooth only if your microphone needs it.
3. Open the recorder and confirm the quality setting, then attach any external microphone.
4. Place the phone close to the speaker on a soft surface, bottom edge facing them, or clip on the lavalier.
5. Record 10 seconds of normal speech and play it back on headphones.
6. Ask for consent on the recording itself if you are recording other people; recording laws differ by country and region, and this is not legal advice.
7. Start the real recording and keep the phone still and untouched until the end.
8. Stop, rename the file with a date and topic, and back it up before deleting anything.

Getting the file off the phone

On an iPhone, open the recording in Voice Memos, use the Share button and choose AirDrop to a Mac, Save to Files, or a cloud drive. Email often fails for long recordings because of attachment size limits. On Android, share the file from the recorder app to a cloud drive, or connect the phone by USB and copy it from the recordings folder, whose name varies by manufacturer.

Rename files before they leave the phone if the app allows it. "New Recording 47" is meaningless a week later; "2026-03-14 shopkeeper interview" isn't. If your app recorded in 3GP or AMR, convert it to M4A or MP3 on your computer first, because many tools don't accept those formats.

Pitfalls specific to phone recordings

• Leaving the phone in a pocket without a lavalier, so the voice is muffled by fabric.
• Recording on a table while people tap, type or set down cups.
• Trusting automatic noise reduction in an app without checking: some "enhance" features make speech sound watery.
• Stopping the recording by accident when unlocking the phone to check the time; lock the screen and leave it alone.
• Long recordings split by the app into several files, which you need to keep in order.
• Covering the microphone with a thick case or your finger.

Phone recordings in mydubly

mydubly accepts M4A, MP3, WAV, AAC, OGG and FLAC audio up to 2 hours per file, so the files phone recorders typically produce can be uploaded as they are; see M4A to text for format notes. You can upload from a computer or straight from the phone's browser. On a phone, keep the page open until the job finishes, because leaving, refreshing or closing it cancels the job; your reserved credits are returned if it ends without a result.

The output is a transcript, a timestamped transcript, SRT and VTT subtitles, and optionally a translated transcript into one of 21 languages. It doesn't label speakers, so in a two-person interview you add names yourself while reading. Translating a video on a phone, rather than recording audio, is covered in the phone translation guide.

Speech recognition and background noise explains why moving the phone closer usually helps more than any app setting.

Next step

Before your next important recording, do a two-minute rehearsal with the phone where you plan to put it and listen back on headphones. When the real recording is done, open audio to text and upload the file. Students recording classes may also find AI transcription for students useful for the permission questions.