What you need to record audio

To make an audio file, you need three things: a way to capture sound (a microphone or line-in connection), software that records what it hears, and a place to save the finished file. Most computers come with a built-in microphone and free recording software already installed, so you may not need to buy anything.

The microphone is usually built into your laptop screen or monitor. If you're using a desktop computer without one, a USB microphone costs $15 to $50 and plugs directly into your computer. The recording software does the actual work of turning sound into a file format your computer can store and play back later.

Key Takeaways

  • Windows computers come with the Voice Recorder app, and Mac computers come with the Voice Memos app — both are free and ready to use without setup.
  • Before you record, check that your microphone is plugged in or turned on, and test it by speaking into it while watching the volume meter in your recording software.
  • After you finish recording, the software will ask you where to save the file and what to name it — save it in a folder you can find again, like Documents or Desktop.
  • The file format (MP3, WAV, M4A) determines what devices can play it back, and some formats take up more storage space than others.

Recording audio on Windows

Windows 10 and 11 both include the Voice Recorder app, which is the simplest way to make an audio file. Open the Start menu, type "voice recorder" in the search box, and click the app when it appears. You'll see a microphone icon in the middle of the window and a red Record button below it.

Before you hit Record, speak a few words and watch the blue sound wave appear on the screen. If you see the wave move, your microphone is working. If nothing happens, check that your microphone is plugged in (if it's external) or that Windows hasn't muted it. To unmute, right-click the speaker icon in the bottom right corner of your screen, click "Open Volume mixer," and make sure the microphone slider is not all the way down.

Once you're ready, click the red Record button and speak clearly into your microphone. The app will show you how long you've been recording. When you're done, click the square Stop button. The app will ask you to name the file — type something you'll remember, like "Interview with Sarah" or "Meeting notes Tuesday." Click Save, and the file will be stored in your Documents folder by default.

Recording audio on Mac

Mac computers come with the Voice Memos app. Open Launchpad (the grid icon in your dock), search for "voice memos," and click the app. You'll see a large red circle in the middle — that's your Record button.

Test your microphone first by speaking and watching the sound wave appear at the bottom of the window. If you don't see movement, go to System Settings, click Sound, and make sure your microphone is selected under "Input." Then return to Voice Memos and try again.

Click the red Record button and speak into your microphone. The app shows elapsed time at the top. When finished, click the red button again to stop. A list of your recordings will appear. Find the one you just made, click it, then click the three dots menu and select "Save." Choose where you want to keep it — Desktop or Documents are easy to find later — and give it a clear name before saving.

Using free third-party recording software

Audacity is a free, open-source recording program that works on Windows, Mac, and Linux. It gives you more control than the built-in apps and lets you edit your recording before saving. Download it from audacityteam.org, install it like any other program, and open it.

In Audacity, click the red Record button at the top left. You'll see a blue waveform appear as you speak. The software automatically detects your microphone, but if it's not working, go to Transport menu, click Preferences, click Devices, and select your microphone from the Recording Device dropdown. When you're done speaking, click the square Stop button.

To save your file, go to File menu and click Export. Choose your file format — MP3 is the most common and works on almost every device, while WAV takes up more space but has better sound quality. Name your file and click Save. Audacity will ask you to set the quality level; the default settings work fine for most purposes.

Understanding audio file formats

The file format is the container that holds your audio. The three most common formats are MP3, WAV, and M4A. MP3 is the smallest and works on every device — phones, computers, cars, and speakers all play MP3 files. WAV files sound slightly better but take up three to ten times more storage space. M4A is Apple's format and works best on iPhones, iPads, and Mac computers, though most modern devices can play it.

When you save a file in Voice Recorder or Voice Memos, the software chooses the format for you — Windows Voice Recorder saves as M4A, and Mac Voice Memos saves as M4A as well. If you want to change the format, use Audacity or another editor to export the file in a different format. For most purposes, MP3 is the safest choice because it plays everywhere.

Where to save your audio file

When you save an audio file, the software will ask you to choose a folder and give the file a name. Use a folder you can find again — Documents, Desktop, or a subfolder you create yourself. Avoid saving to the Downloads folder, because files there are easy to lose track of.

Create a naming system that makes sense to you. Instead of "Recording 1," use "Interview Sarah March 2024" or "Meeting notes 3-15." Include the date if you plan to make many recordings. This way, when you search for a file weeks later, you'll know what it contains without having to listen to it.

If you record often, create a dedicated folder for audio files. On Windows, right-click on your Documents folder, click New, click Folder, and name it "Audio Recordings." On Mac, open Finder, go to Documents, click File menu, click New Folder, and name it the same way. Then save all your audio files there.

Troubleshooting common recording problems

If your recording sounds quiet or muffled, move your microphone closer to your mouth — about 6 inches away is ideal. If you're using a built-in microphone, make sure nothing is blocking it. On laptops, the microphone is usually at the top of the screen, so don't cover it with your hand or place objects in front of it.

If you hear background noise like computer fans, traffic, or air conditioning, try recording in a quieter room. Close windows and doors, turn off fans, and pause any music or videos playing on other devices. If the noise is still there, you can reduce it in Audacity by going to the Effect menu, clicking Noise Reduction, and following the steps.

If the recording stops unexpectedly or the file won't save, check that you have enough free space on your computer. Audio files take up storage, and if your drive is almost full, the recording may fail. On Windows, right-click your C: drive, click Properties, and look at the free space. On Mac, click the Apple menu, click About This Mac, click Storage, and check the available space. If you're low on space, delete old files or move them to an external drive.

Frequently Asked Questions

Can I record audio from a video or another app?

Yes, but it depends on what you're recording. Audacity can record system audio — sound coming from your speakers — if you enable it in Preferences under Devices. On Windows, you may need to install additional software. On Mac, you'll need to use a third-party app like Soundflower. For most purposes, recording a video or call while it's playing is simpler than trying to extract the audio afterward.

What's the difference between recording and exporting?

Recording is the act of capturing sound and storing it temporarily in your software. Exporting is saving that recording as a file on your computer in a specific format. In Voice Recorder and Voice Memos, these happen at the same time — you record and then save. In Audacity, you record first, then export when you're ready to save the final file.

How long can an audio file be?

There's no hard limit, but longer files take up more storage space. A one-hour MP3 recording uses about 50 to 60 megabytes of space. Most computers have hundreds of gigabytes available, so you can record many hours of audio. If you're running low on space, export as MP3 instead of WAV to save room.

Can I edit my recording after I save it?

Yes, if you use Audacity or another audio editor. Open the saved file, make your changes (trim the beginning or end, reduce noise, adjust volume), and export it again. Voice Recorder and Voice Memos don't have built-in editing tools, so you'd need to move the file to Audacity if you want to make changes.

What microphone should I buy if my computer doesn't have one?

A USB microphone is the easiest option — it plugs directly into your computer and works immediately without drivers or setup. The Audio-Technica AT2020USB and Blue Yeti are popular choices in the $50 to $100 range. For under $30, the Samson Q2U works well for voice recording. Avoid very cheap microphones under $15, as they often pick up background noise and sound unclear.