How to Record System Audio (Internal Audio): Windows, Mac & Phone

System audio is the sound your computer plays through its own speakers or headphones: a video's soundtrack, a streaming song, a game's effects, or the voices on a conference call. Recording it means capturing that internal signal directly, without a microphone pointed at a speaker. The result is clean, exactly what the machine produced, with no room echo or background noise. This guide explains what system audio is, how to record it in a browser with no software to install, and how the process differs on Windows, macOS, and phones. It also covers adding your own voice on top, choosing an export format, and fixing the two or three problems that stop most first recordings.

What "System Audio" Actually Means

Every device mixes the sound from its running apps into a single output stream before sending it to the speakers. That combined stream is the system audio, sometimes called internal audio, loopback, or "what you hear." Capturing it is different from recording a microphone. A microphone picks up sound waves travelling through the air, so it also captures the room, the fan, and anything else nearby. Internal capture taps the digital signal before it ever reaches a speaker, so the recording is a faithful copy of the original file or stream.

The distinction matters for quality. Point a microphone at a laptop speaker and the recording will sound thin, distant, and full of reflections. Capture the same audio internally and it arrives at full fidelity, identical to the source. This is why anyone recording a webinar, a music track, a voice-chat call, or a tutorial soundtrack wants the internal route rather than the microphone route. The trade-off is that operating systems guard internal audio carefully, since it can contain anything playing on the machine — which is exactly why the capture flow asks for explicit permission every time.

Record Internal Audio in the Browser — No Software Needed

Older methods for capturing internal sound relied on installed software or virtual audio drivers such as Stereo Mix or loopback utilities. That is no longer necessary. Modern browsers expose a screen-sharing feature that can also capture the audio playing on the machine, and the free Internal Audio Recorder uses it to record system sound directly in a tab. Nothing is uploaded; the audio is captured, encoded, and saved entirely inside the browser. Because it runs on the browser's own screen-capture permission, it works without drivers on any recent Chromium browser — Chrome, Edge, Brave, or Opera.

The workflow is short, but one step decides whether it works at all: the "Share audio" checkbox in the browser's share dialog. If that box is left unticked, the recording will be silent, because the browser captures the screen without its sound. The steps below cover a typical session from start to finished file.

1. Open the Internal Audio Recorder and press Record system audio.
2. In the browser's share dialog, choose what to capture — a browser tab, a window, or the whole screen — and tick Share audio (or Share tab audio) before confirming.
3. Play the source: start the video, song, call, or game whose sound you want to keep.
4. Watch the level meter move to confirm sound is arriving, then let it record for as long as you need.
5. Press Stop, preview the take, trim it in the Editor if needed, choose a format, and download.

Sharing a single browser tab is the most reliable choice when the sound comes from a website, because tab audio is isolated and captured cleanly. Sharing the whole screen captures everything the system plays, which is what you want for a desktop app, a game, or a call running outside the browser.

Recording System Audio on Windows

Windows offers the most complete support for internal capture. In Chrome or Edge, the share dialog presents three tabs — Chrome Tab, Window, and Entire Screen — and each can include audio. Choosing Entire Screen and ticking Share system audio captures the full mix from every application at once: the browser, a desktop music player, a game, and notification sounds together. Choosing a single tab isolates just that page's sound, which is cleaner when you only want one source.

This makes Windows the simplest platform for recording a whole session, such as a game with its own launcher or a video call running in a desktop client. If the browser lists "Entire Screen" but greys out the audio option, update to the latest version; whole-system audio sharing was added to Chromium some releases ago and older builds lack it. A quick check that the machine's playback device is working — and that the audio is not muted at the system level — avoids a silent recording before you start.

Recording System Audio on macOS

On a recent Mac, a Chromium browser can capture system audio much like on Windows, including sharing the whole screen with its sound. When you pick Entire Screen and enable audio sharing, the recording captures the combined output of the machine. If a particular app's sound does not come through on a full-screen share, the dependable fallback is to share the specific browser tab playing the audio and tick Share tab audio, which always works for anything playing on a website.

Two practical notes help on macOS. First, the operating system may ask for Screen Recording permission the first time; grant it under System Settings › Privacy & Security › Screen & System Audio Recording, then reload the page. Second, Safari does not support audio capture through screen sharing, so use Chrome, Edge, Brave, or Opera. If you are unsure whether the microphone or output is even working before a session, a quick check at Microphone-Test.org confirms your hardware and browser permissions in a few seconds.

Recording System Audio on a Phone

Phones are more restrictive than computers. Mobile browsers do not expose the screen-and-audio capture used on desktop, so recording internal sound from a phone browser is generally not possible the same way. On Android, the built-in screen recorder in the system's Quick Settings can capture internal audio on many devices; start it, play the sound, then stop and save the video, and extract the audio afterwards with the Converter. On iPhone and iPad, the Control Centre screen recorder captures app audio into a video file, which you can then convert to an audio-only format.

For anything demanding, recording on a computer gives more control, higher quality, and direct audio-file output without the video wrapper. If a phone is the only option, capturing through the system screen recorder and converting the file afterwards is the reliable path. The table below summarises where each method works.

Platform & browser	Whole-screen system audio	Single-tab audio	Notes
Windows — Chrome / Edge	Yes	Yes	Fullest support; captures the whole mix
macOS — Chrome / Edge / Brave	Yes	Yes	Tab share is the safe fallback
Any OS — Safari	No	No	No audio via screen sharing; use Chromium
Android — system recorder	Yes (device-dependent)	—	Records to video; convert to audio after
iPhone / iPad — Control Centre	Yes	—	Records to video; convert to audio after

Add Your Microphone on Top of System Audio

Commentary, reaction videos, and tutorials need two sources at once: the system sound and your own voice. The Internal Audio Recorder can mix a microphone into the captured system stream, so the finished file contains both. Enable the microphone overlay before recording, choose the input device, and the tool blends your voice with the internal audio in real time. The control locks once recording begins and unlocks again on stop, so the source mix stays consistent through a take.

When mixing a microphone with system audio, use headphones. If the system sound plays through open speakers, the microphone will pick it up as well, creating a doubled, echoing result. Headphones keep the two sources separate, so the microphone captures only your voice while the system audio is added cleanly underneath. For a pure voice recording with no system sound at all, the standard Audio Recorder captures the microphone on its own.

Choosing a Format and Cleaning Up the Recording

Once the audio is captured, the export format decides file size and compatibility. For a recording that is finished and ready to share, a compressed format such as MP3 or M4A keeps the file small while sounding fine for speech, music demos, and call archives. For anything you will edit further, an uncompressed WAV or a lossless FLAC preserves every detail; the dedicated FLAC Recorder produces lossless files that stay smaller than WAV at the same quality.

Cleanup is often worth a minute of work. If the capture contains a quiet hum or steady background noise, the Editor includes a Remove background noise effect alongside trim, normalise, and volume tools, so you can tidy the take without leaving the browser. A large file that needs to travel by email or upload can be shrunk with the Compressor, and a file recorded in the wrong container can be switched with the Converter — all without uploading anything to a server.

Fixing Common Problems

Most failed recordings come from one of three causes. The commonest is a silent file: the screen was shared but the audio box was left unticked. Start again and confirm Share audio is enabled before clicking Share. The second is choosing the wrong source — sharing a tab that is not the one playing sound, or sharing a window whose app routes audio elsewhere. Sharing the correct tab, or the entire screen, resolves it. The third is Safari, which cannot capture audio through screen sharing at all; switch to a Chromium browser.

If the level meter stays flat even with audio sharing enabled, check that the source is actually playing and that the system volume is not muted — internal capture follows the playback mix, so a muted output yields a silent recording. When only the microphone is needed rather than system sound, and permissions seem to be the obstacle, verifying the device at Microphone-Test.org quickly separates a hardware problem from a browser-permission one.

What You Can Record

Internal capture suits any situation where the sound already exists on the machine. People use it to save a webinar or online lecture for later review, to keep a copy of a voice or video call for their own records, to pull the audio from a streaming video or a game, and to capture a song or podcast episode as it plays. Language learners record native-speaker audio to study pronunciation, and creators grab reference tracks and sound effects for editing. In each case the recording is a clean digital copy, free of the room noise a microphone would add. With the microphone overlay, the same tool covers narration and commentary over any of these sources, turning a browser tab into a complete capture setup.

Frequently Asked Questions

Is anything uploaded to a server when I record?

No. The audio is captured, encoded, and saved entirely inside your browser. Nothing is sent to a server, and closing the tab discards anything you did not download.

Why is my recording silent?

Almost always because the "Share audio" (or "Share tab audio") checkbox was not ticked in the browser's share dialog. Record again and enable it before confirming. Also check that the source is playing and the system is not muted.

Can I record system audio on a Mac?

Yes. A recent Chromium browser on macOS can capture system audio, including a whole-screen share. If a full-screen share misses an app's sound, share the specific browser tab instead. Safari is not supported.

Can I record internal audio on my phone?

Not through a mobile browser directly. Use your phone's built-in screen recorder to capture app audio into a video, then convert it to an audio file with the Converter.

How do I record system audio and my voice together?

Enable the microphone overlay in the Internal Audio Recorder before you start, and use headphones so the system sound is not picked up by the mic. The finished file will contain both sources mixed together.