注：本文为 “电脑音频录制 ” 相关合辑。
英文引文，机翻未校。
未整理去重，如有内容异常，请看原文。

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How to Record Computer Audio in 6 Free Ways

如何用 6 种免费方式录制电脑音频

Sponsored by EaseUS

Nov 28, 2023 4:34 am PST

Key Takeaways:

要点总结：

• To record audio on a Windows PC, there is a built-in sound recorder for Windows 10 that is capable of capturing your microphone sound with simple clicks. If you work with an older Windows system (Windows XP/Vista), you can use the Stereo Mix.
  在 Windows 电脑上录制音频，Windows 10 有内置的声音录音机，可以通过简单的点击捕捉麦克风声音。如果你使用的是较老的 Windows 系统（Windows XP/Vista），可以使用立体声混音。

• For those seeking open-source computer audio recorders, OBS and Audacity are good options. But you need a long learning curve to create crystal sound quality.
  对于那些寻找开源电脑音频录音机的人来说，OBS 和 Audacity 是不错的选择。但要创造出高质量的声音，你需要一个较长的学习过程。

• For your convenience, you can use a professional audio recorder like EaseUS RecExperts, which supports capturing both internal and external sound coming from a computer without background noise.
  为了方便，你可以使用像 EaseUS RecExperts 这样的专业音频录音机，它支持捕捉电脑发出的内部和外部声音，且无背景噪音。

Knowing how to record computer audio will always be greatly helpful, especially when you want to record podcasts, interviews, streaming music, audio calls, and more. This post will discuss some excellent computer audio recorders and provide step-by-step guides for recording sound on a computer. Additionally, you will explore some tips for sound recording here. Without further ado, let’s get started now!
掌握如何录制电脑音频总是非常有帮助的，尤其是在你想要录制播客、访谈、流媒体音乐、音频通话等时。这篇文章将讨论一些优秀的电脑音频录音机，并提供在电脑上录制声音的逐步指南。此外，你还将在这里探索一些声音录制的技巧。不多说，让我们马上开始吧！

Method 1. How to perfectly record audio from computer system and microphone

方法 1. 如何完美录制电脑系统和麦克风的音频

• Compatibility: Windows 7/8/8.1/10/11 & macOS 10.13 and later
  兼容性：Windows 7/8/8.1/10/11 和 macOS 10.13 及更高版本

• Best for: Both novices and professionals deal with multiple audio source recording and editing on PC and Mac
  最适合：适合新手和专业人士在 PC 和 Mac 上进行多音频源录制和编辑

EaseUS RecExperts is an ideal tool to record audio from your computer, including the system sound, speaker, external audio from microphones, or all simultaneously. That means you are free to record streaming songs, your own vocals, or speeches easily. Besides, it offers a special silent recording mode that can start recording sound on your PC while it’s in silent mode, which is best for someone who works or studies in a relatively quiet place.
EaseUS RecExperts 是一个理想的工具，可以录制电脑的音频，包括系统声音、扬声器、麦克风的外部音频，或者同时录制所有这些声音。这意味着你可以轻松地录制流媒体歌曲、自己的人声或演讲。此外，它还提供了一种特殊的静音录制模式，可以在电脑处于静音模式时开始录制声音，这对于在相对安静的环境中工作或学习的人来说非常合适。

In addition, it also provides other tools to help improve your recording experience and guarantee audio recording quality:
此外，它还提供了其他工具来帮助改善你的录制体验并保证音频录制质量：

• Start and stop recording music on your computer automatically
  自动开始和停止录制电脑上的音乐

• Adjust the volume of your recording at any time during the recording
  在录制过程中随时调整录制音量

• Provide an AI noise remover to reduce and even eliminate the background noise
  提供人工智能降噪功能，以减少甚至消除背景噪音

• Save your audio recordings to MP3, OGG, WMA, and other audio files
  将你的音频录制保存为 MP3、OGG、WMA 等音频文件

Here is how to use EaseUS RecExperts to record sound from a computer:
以下是使用 EaseUS RecExperts 录制电脑声音的方法：

Step 1. Launch this software on your computer, and click Settings in the top right corner to adjust your audio recording parameters. Here, you can choose to record computer audio to MP3, AAC, FLAC, OGG, or other audio files freely. Also, choose the right audio bitrate and sample rate and hit OK.
第一步。 在你的电脑上启动该软件，点击右上角的设置以调整音频录制参数。在这里，你可以自由选择将电脑音频录制为 MP3、AAC、FLAC、OGG 或其他音频文件。同时，选择正确的 音频比特率和采样率 并点击确定。

Step 2. Click the Speaker icon on the left panel to choose the audio source. If you select the System sound for capturing internal sound from the computer, you can hit the nearby down arrow to choose Record silently. That means you can record audio files while your computer is in silent mode.
第二步。 点击左侧面板上的扬声器图标以选择音频源。如果你选择系统声音来捕获电脑的内部声音，你可以点击旁边的下箭头选择 静音录制。这意味着你可以在电脑处于静音模式时录制音频文件。

Step 3. For microphone recording, you can also enable advanced recording features by clicking the down arrow: Microphone Boost and Microphone noise reduction. Enabling these features will guarantee high-quality audio recordings.
第三步。 对于麦克风录制，你还可以通过点击下箭头启用高级录制功能：麦克风增益和 麦克风降噪。启用这些功能将保证高质量的音频录制。

Step 4. Next, click REC to begin recording audio files on your computer. Once done, you can trim or compress the recorded audio files as you like.
第四步。 接下来，点击 REC 开始在你的电脑上录制音频文件。完成后，你可以根据需要修剪或压缩录制的音频文件。

Method 2. How to record the sound coming from PC exclusively on Windows 11/10/8.1

方法 2. 如何在 Windows 11/10/8.1 上独家录制来自 PC 的声音

• Compatibility: Windows 7/8/8.1/10/11
  兼容性：Windows 7/8/8.1/10/11

• Best for: Users who only want to do simple sound recording tasks without editing needs, like recording singing, vocals, and more
  最适合：仅需要进行简单声音录制任务且无需编辑功能的用户，例如录制唱歌、人声等

For users who want to record audio files on Windows 10 or 11 without installing any third-party software, the Windows Voice Recorder (now called Windows Sound Recorder in Windows 11 OS) is a great option. This freeware lets you capture sound on your computer within 3 simple steps, and it’s regarded as one of the easiest solutions for recording yourself singing, talking, taking voice messages, etc.
对于那些想要在 Windows 10 或 11 上录制音频文件且不安装任何第三方软件的用户，Windows 语音录音机（在 Windows 11 系统中现称为 Windows 音频录音机）是一个很好的选择。这款免费软件可以在 3 个简单的步骤内捕捉你电脑上的声音，被认为是录制自己唱歌、说话、录制语音信息等的最简单解决方案之一。

If you are working in OneNote and need to capture audio, you can directly record computer audio via OneNote to save time.
如果你在 OneNote 中工作并需要捕捉音频，你可以直接通过 OneNote 录制电脑音频，以节省时间。

Here are the steps to record sound on a computer on Windows 10 with Windows Sound Recorder:
以下是使用 Windows 10 上的 Windows 音频录音机录制电脑声音的步骤：

Step 1. Open the Start menu and enter Voice Recorder in the search box to open it.
第一步。 打开开始菜单，在搜索框中输入语音录音机以打开它。

Step 2. Next, click the blue microphone in the center to start your voice recording.
第二步。 接下来，点击中央的蓝色麦克风以开始你的语音录制。

Note: For Windows 11 users, you need to hit the red button or use Ctrl + R to begin your audio recording.
注意： 对于 Windows 11 用户，你需要点击红色按钮或使用 Ctrl + R 来开始你的音频录制。

Step 3. To end your recording, click Stop. Once done, you can find the recordings saved in MP3 on your computer.
第三步。 要结束你的录制，点击停止。完成后，你可以在你的电脑上找到保存为 MP3 的录制文件。

Method 3. How to flexibly record on Windows 7 and earlier

方法 3. 如何在 Windows 7 及更早版本上灵活录制

• Compatibility: Windows 7/Vista/XP
  兼容性：Windows 7/Vista/XP

• Best for: Windows users who need to record music and songs on an older computer, like Windows Vista, XP, etc.
  最适合：需要在旧电脑上录制音乐和歌曲的 Windows 用户，例如 Windows Vista、XP 等。

Another way to record your favorite songs and music from a computer is to use the Stereo Mix, which is a special computer audio recorder provided by your sound drivers. If your sound driver contains this tool, you are able to use it to capture all sound coming from your computer, including the system sound, microphone audio, game audio, and more.
另一种从电脑上录制你最喜欢的歌曲和音乐的方法是使用立体声混音，这是由你的声音驱动程序提供的一个特殊的电脑音频录音机。如果你的声音驱动程序包含这个工具，你可以使用它来捕捉电脑发出的所有声音，包括系统声音、麦克风音频、游戏音频等。

To capture sound on a Windows PC using Stereo Mix, you need to know some basic settings in the Windows system first, which will take about 20 to 30 minutes.
要使用立体声混音在 Windows 电脑上捕捉声音，你需要先了解一些 Windows 系统的基本设置，这将花费大约 20 到 30 分钟。

Here is the tutorial for capturing audio on a Windows computer:
以下是 Windows 电脑上捕捉音频的教程：

Step 1. Open the Control panel, then click Hardware and Sound > Sound.
第一步。 打开控制面板，然后点击硬件和声音 > 声音。

Step 2. Next, in the window that appears, choose the Recording tab, where you can find the Stereo mix button.
第二步。 接下来，在出现的窗口中，选择录制选项卡，在那里你可以找到立体声混音按钮。

Step 3. Then, right-click Stereo Mix and choose Enable. Click OK to apply the changes.
第三步。 然后，右键点击立体声混音并选择启用。点击确定以应用更改。

Method 4. How to record audio on computer for free via Audacity

方法 4. 如何通过 Audacity 免费在电脑上录制音频

• Compatibility: Windows & Mac & Linux
  兼容性：Windows 和 Mac 和 Linux

• Best for: Users who want to record and edit audio professionally for producing songs, podcasts, and more for free.
  最适合：想要免费专业录制和编辑音频以制作歌曲、播客等的用户。

If you prefer a free and professional tool to record computer audio, take a look at Audacity. As one of the most popular audio capture software, it is widely used for any purpose of sound recording, including recording vocals, creating songs, capturing voice calls, and others.
如果你喜欢一个免费且专业的工具来录制电脑音频，看看 Audacity。作为最受欢迎的 音频捕捉软件 之一，它被广泛用于任何声音录制的目的，包括录制人声、创作歌曲、捕捉语音通话等。

This freeware functions in capturing system audio, recording multiple tracks at once, applying filters to recordings, and more. That means you are able to record and edit your audio files at once and then export them to MP3 or other formats. If you just use this freeware for basic audio or vocal recording, you can start the task once you open it. However, to create high-quality music files, you need to take time to learn the advanced settings and install the necessary plugins.
这款免费软件的功能包括捕捉系统音频、同时录制多个音轨、对录制应用滤镜等。这意味着你可以一次性录制和编辑你的音频文件，然后将它们导出为 MP3 或其他格式。如果你只是使用这款免费软件进行基本的音频或人声录制，你可以在打开它后立即开始任务。然而，要创建高质量的音乐文件，你需要花时间学习高级设置并安装必要的插件。

Here is how to record internal and external sound from a computer using Audacity:
以下是使用 Audacity 从电脑录制内部和外部声音的方法：

Step 1. Download and install Audacity on your computer, then open it.
第一步。 在你的电脑上下载并安装 Audacity，然后打开它。

Step 2. Click the Audio Setup option in the top toolbar and click Host > Windows WASAPI.
第二步。 点击顶部工具栏中的音频设置选项，点击主机 > Windows WASAPI。

Step 3. Next, choose the Audio Setup button again to select the recording device.
第三步。 接下来，再次点击音频设置按钮以选择录制设备。

Step 4. Then, click the red circle button to begin your recording.
第四步。 然后，点击红色圆形按钮开始你的录制。

Step 5. Once your audio recording is done, click File > Export to save your audio recordings to MP3, WAV, or OGG format. (By default, your audio recordings will be saved in MP3 format.)
第五步。 一旦你的音频录制完成，点击文件 > 导出，将你的音频录制保存为 MP3、WAV 或 OGG 格式。（默认情况下，你的音频录制将保存为 MP3 格式。）

Method 5. How to record computer audio on Mac free with OBS

方法 5. 如何在 Mac 上免费使用 OBS 录制电脑音频

• Compatibility: Windows & macOS & Linux
  兼容性：Windows 和 macOS 和 Linux

• Best for: Advanced users who want to do audio recording and streaming on various platforms
  最适合：想要在各种平台上进行音频录制和流媒体的高级用户

OBS Studio is another completely free tool that can help you capture sound coming from your PC, Mac, or Linux. This software enables you to flexibly choose your target audio sources, like the system sound, capture card sound, microphone sound, and more. Besides, it provides options for adjusting audio bitrate, sample rate, and channels for those professional music creators who want to create fantastic songs here. Similar to Audacity, this freeware also allows you to install plugins if needed.
OBS Studio 是另一个完全免费的工具，可以帮助你捕捉来自你的 PC、Mac 或 Linux 的声音。这款软件使你可以灵活地选择你的目标音频源，如系统声音、采集卡声音、麦克风声音等。此外，它还为那些想要在这里创作精彩歌曲的专业音乐创作者提供了调整音频比特率、采样率和声道的选项。与 Audacity 类似，这款免费软件也允许你在需要时安装插件。

However, it is a little difficult to use this free audio recorder because of its complicated UI. According to our teams’ testing statistics, a beginner needs a long learning curve (3 – 4 hours for basic settings and functions) to handle this tool.
然而，由于其复杂的用户界面，使用这个免费音频录音机有点困难。根据我们团队的测试统计，初学者需要一个较长的学习过程（3 - 4 小时用于基本设置和功能）来掌握这个工具。

Now, let’s see how it works for recording computer audio on Mac and Windows:
现在，让我们看看它在 Mac 和 Windows 上录制电脑音频是如何工作的：

Step 1. Install and launch OBS Studio on your PC or Mac.
第一步。 在你的 PC 或 Mac 上安装并启动 OBS Studio。

Step 2. Next, in the window’s upper-left, click File > Settings > Audio to set your audio device input. Besides, click Output to select the audio format for your recordings.
第二步。 接下来，在窗口的左上角，点击文件 > 设置 > 音频，以设置你的音频设备输入。此外，点击输出以选择你的录制的音频格式。

Step 3. This freeware simultaneously records the visible screen and audio by default. To record computer audio only, you need to check the eye symbol to disable the visual capture.
第三步。 这款免费软件默认同时录制可见屏幕和音频。要仅录制电脑音频，你需要点击眼睛符号以禁用视觉捕捉。

Step 4. When everything is ready, click Start Recording to begin capturing PC audio now.
第四步。 当一切都准备好了，点击开始录制以开始捕获 PC 音频。

Method 6. How to directly start recording computer audio online

方法 6. 如何直接在线开始录制电脑音频

• Compatibility: web-based (Windows & macOS & Linux)
  兼容性：基于网络（Windows 和 macOS 和 Linux）

• Best for: Windows and Mac users who want to record songs and voice on computer audio directly without any app.
  最适合：想要直接在电脑音频上录制歌曲和人声且不使用任何应用程序的 Windows 和 Mac 用户。

For those who want to record computer audio on a PC or Mac without any app, Chrome Audio Capture should be the first choice.
对于那些想要在 PC 或 Mac 上录制电脑音频且不使用任何应用程序的人来说，Chrome 音频捕捉应该是首选。

It is regarded as one of the easiest ways to record audio from a PC or laptop. Whether you are going to capture audio from your speakers, the internal audio coming from your computer, or others, you can get the task done with this extension effortlessly.
它被认为是录制来自 PC 或笔记本电脑音频的最简单方法之一。无论你是要从你的扬声器、电脑内部音频或其他来源捕捉音频，你都可以使用这个扩展轻松完成任务。

Here is how to record computer audio online:
以下是在线录制电脑音频的方法：

Step 1. Add the Chrome Audio Capture extension.
第一步。 添加 Chrome 音频捕捉扩展。

Step 2. Choose the audio input that you want to capture and click Start Capture. To end the recording, you can hit Ctrl + Shift + X hotkeys on your keyboard.
第二步。 选择你想要捕捉的音频输入并点击开始捕捉。要结束录制，你可以按下键盘上的 Ctrl + Shift + X 快捷键。

Bonus: How to record sound from a computer in high quality

额外福利：如何高质量地录制电脑声音

To help you create a high-quality audio recording on your PC or Mac, you can take a glance at the useful tips below:
为了帮助你在 PC 或 Mac 上创建高质量的音频录制，你可以看看下面的有用提示：

1. Choose an excellent computer audio recorder

1. 选择一款出色的电脑音频录音机

First of all, a professional computer audio recorder is a must. While selecting the tool, you need to focus on its recording options, like microphone sound, computer internal audio, sound card, etc.
首先，一款专业的电脑音频录音机是必须的。在选择工具时，你需要关注它的录音选项，如麦克风声音、电脑内部音频、声卡等。

2. Use A good microphone

2. 使用一个好的麦克风

Most users prefer to use the built-in microphone on laptops for recording computer audio, as it is convenient. However, the quality cannot be guaranteed because of the distance. So, you’d better find and use a professional external microphone for recording.
大多数用户喜欢使用笔记本电脑内置的麦克风来录制电脑音频，因为它很方便。然而，由于距离的原因，质量无法保证。所以，你最好找一个专业的外接麦克风来录制。

3. Create a quiet environment

3. 创造一个安静的环境

Any background noise (like talking, typing, coughing, etc.) will affect the quality of your audio recordings. Thus, you also need to choose and create a relatively quiet environment for recording sound from a computer with a microphone.
任何背景噪音（如说话、打字、咳嗽等）都会影响你的音频录制质量。因此，你还需要选择并创造一个相对安静的环境，以便用麦克风录制电脑声音。

How to record computer audio FAQs

如何录制电脑音频常见问题解答

1. How do I record audio from my computer browser?

1. 如何从我的电脑浏览器录制音频？

To record audio from your computer browser quickly, you can choose to use some online computer audio recorder extensions, like Chrome Audio Capture, Notta, and more. All you need to do is to install this tool and choose the audio source that you want to capture. That’s it!
要快速从你的电脑浏览器录制音频，你可以选择使用一些在线电脑音频录制器扩展，如 Chrome 音频捕捉、Notta 等。你只需要安装这个工具并选择你想要捕捉的音频源。就这样！

2. Can I record streaming audio on my computer?

2. 我可以在我的电脑上录制流媒体音频吗？

Sure! You can record streaming audio on your computer as long as you have the right streaming audio recorder. For example, the EaseUS RecExperts will help you capture streaming audio on your Windows or Mac computer. Besides, it can export the recordings in up to 10 different formats for later sharing.
当然可以！只要你有合适的流媒体音频录制器，你就可以在你的电脑上录制流媒体音频。例如，EaseUS RecExperts 将帮助你在你的 Windows 或 Mac 电脑上捕获流媒体音频。此外，它还可以将录制内容导出为多达 10 种不同的格式，以便后续分享。

3. Does Windows 10 have an audio recorder?

3. Windows 10 有音频录制器吗？

Of course, yes! There is a built-in audio recorder on your Windows 10 system, and it’s called Voice Recorder. This freeware will help you capture microphone sound from your PC. Keep in mind that it is not capable of recording the internal sound on your computer.
当然有！你的 Windows 10 系统有一个内置的音频录制器，它叫做语音录制器。这个免费软件将帮助你从你的电脑捕捉麦克风声音。请记住，它无法录制电脑内部的声音。

4. Can QuickTime record computer audio?

4. QuickTime 可以录制电脑音频吗？

Yes. QuickTime can record computer audio on a Mac device.
是的。QuickTime 可以在 Mac 设备上录制电脑音频。

For recording external sound from a microphone on a computer, you just need to follow the on-screen instructions to make it.
对于从电脑麦克风录制外部声音，你只需要按照屏幕上的说明进行操作。

But, to record the computer’s system audio, you need to install the extra plugin called Soundflower, and then you can begin your recording.
但是，要录制电脑的系统音频，你需要安装一个名为 Soundflower 的额外插件，然后你就可以开始录制了。

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How to Record Internal Audio on Windows?

如何在 Windows 上录制内部音频？

Last updated on July 4, 2025 by Alec Bird, Posted to record audio

If you’ve ever tried to record what’s playing in your headphones — be it a Twitch stream or music from your browser — you’ve probably encountered a problem: how to capture system sound directly?
如果你曾经尝试录制你耳机里播放的内容 —— 不管是 Twitch 直播还是浏览器里的音乐 —— 你可能遇到了一个问题：如何直接捕获系统声音？

It would seem that the computer itself plays it. So, it should be able to save it. But no. It’s not that simple.
似乎电脑本身就在播放它。所以，它应该能够保存它。但事实并非如此。这并不简单。

Recording the sound that goes through your sound card is a task that has changed over the years. From cables and analog connections to software solutions that work “out of the box”.
录制通过你的声卡的声音是一项随着时间而变化的任务。从电缆和模拟连接到“开箱即用”的软件解决方案。

I’ve been working on this topic for a long time. I’ve tested everything: from old methods to modern APIs in Windows. So, let’s figure out how it was done before, why these methods are outdated, and what tools work now, without unnecessary magic.
我已经研究这个话题很长时间了。我测试了所有的东西：从旧方法到 Windows 中的现代 API。所以，让我们来搞清楚以前是如何做到的，为什么这些方法已经过时，以及现在哪些工具有效，无需不必要的魔法。

1 AUX cable - the good old way

1 AUX 电缆 —— 老办法

Yes, back in the day, people would simply use a 3.5mm stereo cable to record audio from a computer, connecting the output of the sound card to the microphone input.
是的，过去，人们会简单地使用一个 3.5 毫米立体声电缆来从电脑录制音频，将声卡的输出连接到麦克风输入。

This was the easiest way, available to everyone. You would connect speakers to one port, and an external recorder to the other, and boom, the sound would go in.
这是最简单的方法，每个人都可以使用。你会将扬声器连接到一个端口，将外部录音机连接到另一个端口，然后，声音就进去了。

But there were two big downsides:
但有两个很大的缺点：

First, the quality. You are essentially making a digital-to-analog transition, then back again. Each conversion adds noise and loses detail. Especially if your DAC (digital-to-analog converter) is weak - and most budget sound cards are just that.
首先，是质量。你实际上是在进行一次数字到模拟的转换，然后再转回去。每次转换都会增加噪音并丢失细节。特别是如果你的 DAC（数字到模拟转换器）很弱 —— 而大多数预算声卡正是如此。

Second, you lose the ability to listen in headphones while recording. Because one of the ports is occupied by a cable. Theoretically, it would be possible to connect an Y-splitter to the output of the sound card and connect headphones through it, but I couldn’t find any on sale and soldered it myself. Another option was to use a second sound card, but this option appeared later, when integrated sound cards began to be installed on motherboards.
其次，你在录制时无法用耳机听。因为其中一个端口被电缆占用了。从理论上讲，可以将一个 Y 分离器连接到声卡的输出端，并通过它连接耳机，但我找不到任何出售的，只好自己焊接。另一个选择是使用第二块声卡，但这个选项是在后来出现的，当时集成声卡开始安装在主板上。

In general, this option was no worse than recording sound on a good tape recorder. But today we can do it much better.
总的来说，这个选项并不比用一台好的磁带录音机录制声音差。但今天我们可以做得更好。

2 Stereo Mix - Trying to Record Digitally Inside the System

2 立体声混音 —— 尝试在系统内部数字录制

Stereo Mix is a feature that some sound card manufacturers added to their drivers. It allowed all audio being output to be captured digitally, without any analog translation.
立体声混音 是一些声卡制造商在其驱动程序中添加的一个功能。它允许所有输出的音频被数字捕获，无需任何模拟转换。

So if you play a movie, music, or game, Stereo Mix takes the signal before it goes to the speakers and routes it to the recorder. This was a big step up from cables.
所以，如果你播放电影、音乐或游戏，立体声混音会在信号到达扬声器之前将其捕获，并将其路由到录音机。这比使用电缆是一个很大的进步。

The upside to this method was that the audio remained clean, without any loss of quality. It was simply routed inside the system.
这种方法的优点是音频保持干净，没有任何质量损失。它只是在系统内部被路由。

But there were downsides:
但也有缺点：

• Not all sound cards support Stereo Mix
  并非所有声卡都支持立体声混音

• The name may vary depending on the manufacturer (e.g. “Wave Out” or “What U Hear”)
  名称可能因制造商而异（例如“Wave Out”或“What U Hear”）

• Microsoft started removing this feature after pressure from the RIAA because it could be used to bypass DRM
  由于 RIAA 的压力，微软开始移除这个功能，因为它可以被用来绕过 DRM

• It only works with one device.
  它只与一个设备一起工作。

It was a breakthrough at the time, but only for a few lucky ones. Because this method only works if you’re lucky with the drivers. And if you’re using a modern laptop with an integrated sound card, you probably won’t even find Stereo Mix.
当时这是一个突破，但只有少数幸运的人可以使用。因为这个方法只有在你的驱动程序足够幸运时才能工作。而且，如果你使用的是带有集成声卡的现代笔记本电脑，你可能根本找不到立体声混音。

3 Virtual sound card - software replacement for physical

3 虚拟声卡 —— 物理设备的软件替代品

When manufacturers started to remove Stereo Mix, third-party developers found their way - they created virtual sound cards. These are programs that emulate an audio output device, but instead of sending a signal to the speakers, they pass it to a recording program or write directly to a disk.
当制造商开始移除立体声混音时，第三方开发者找到了他们的方法 —— 他们创建了虚拟声卡。这些程序模拟一个音频输出设备，但不是将信号发送到扬声器，而是将其传递给一个录音程序或直接写入磁盘。

Examples of such solutions: VB-Cable, Voicemeeter, Virtual Audio Cable.
此类解决方案的例子：VB-Cable、Voicemeeter、Virtual Audio Cable。

They work like this: you install a virtual device like “Cable Input” or “VAC Line In”, set it as the default output, and everything that plays in the system starts to go to the recorder as a pure digital signal.
它们的工作原理如下：你安装一个虚拟设备，如“Cable Input”或“VAC Line In”，将其设置为默认输出，系统中播放的所有内容都开始以纯数字信号的形式进入录音机。

Pros:
优点：

• No loss of quality
  无质量损失

• You can capture sound from any source
  你可以从任何来源捕获声音

• Ability to mix multiple audio streams
  能够混合多个音频流

Cons:
缺点：

• Often requires manual configuration
  通常需要手动配置

• Compatibility with some programs may not be ideal
  与某些程序的兼容性可能不理想

Creating a reliable driver is not such an easy task. Even solutions that have been tested for years sometimes cause problems. Not to mention dozens of low-quality fakes that worked only with native software and did not meet all specifications. Often, such virtual devices led to failures in the operation of audio software and could even cause a blue screen of death.
创建一个可靠的驱动程序并非易事。即使是经过数年测试的解决方案有时也会出现问题。更不用说那些只与原生软件兼容且不符合所有规范的低质量仿制品了。通常，这些虚拟设备会导致音频软件运行失败，甚至可能导致蓝屏死机。

Universal solutions, such as VAC, allow you to flexibly redirect audio streams between individual devices, but require painstaking configuration, sometimes by trial and error.
通用解决方案，如 VAC，允许你在各个设备之间灵活地重定向音频流，但需要精心配置，有时甚至需要通过反复试验。

4 Code injection - not a good idea

4 代码注入 —— 并非好主意

There is another method that is more related to hacking than to normal audio work.
还有一种方法，与其说它与正常的音频工作有关，不如说它与黑客行为有关。

Some developers have started using code injection into applications to intercept calls to audio drivers. That is, the program is loaded directly into the address space of the browser, media player or Skype and reads the sound before it is output. I’ve only come across one application that uses this technique - Skype Call Recorder, but its website is now defunct.
一些开发者开始使用代码注入应用程序来拦截对音频驱动程序的调用。也就是说，该程序直接加载到浏览器、媒体播放器或 Skype 的地址空间中，并在声音输出之前读取它。我只遇到过一个使用这种技术的应用程序 —— Skype 通话录音机，但它的网站现在已经不存在了。

Sounds like a technology from the world of viruses? Yes, because it is almost the same thing that spyware does. Therefore, antiviruses often block such programs, and using them is not the safest idea.
听起来像病毒世界的技术？没错，因为这和间谍软件做的事情几乎一样。因此，杀毒软件经常阻止这类程序，使用它们并不是最安全的选择。

In addition, this approach only worked on old versions of Windows. In newer versions, the system blocks access to audio streams in this way, and most of these tools either do not work or cause blue screens of death.
此外，这种方法只在 Windows 的旧版本上有效。在新版本中，系统会阻止以这种方式访问音频流，这些工具要么无法工作，要么会导致蓝屏死机。

5 Loopback recording - a Windows standard

5 回环录制 —— Windows 的标准方式

With the advent of Windows Vista, Microsoft finally solved the issue of recording system sound officially. They implemented Loopback recording, which allows you to capture everything that plays on your speakers directly in digital form. That is, you simply select the “Speakers” device in the sound settings, and everything that is played becomes available for recording.
随着 Windows Vista 的问世，微软终于正式解决了录制系统声音的问题。他们实现了回环录制，允许你直接以数字形式捕获扬声器上播放的所有内容。也就是说，你只需在声音设置中选择“扬声器”设备，所有播放的内容都可以被录制。

This was made possible by WASAPI Loopback, a new sound management technology in Windows. Now it does not matter what chipset you have, Realtek, Creative or Intel - everything works the same.
这得益于 Windows 中的一种新的声音管理技术 WASAPI 回环。现在，无论你使用的是哪种芯片组，Realtek、Creative 还是 Intel，一切都能正常工作。

Pros:
优点：

• Supported by all modern sound cards
  所有现代声卡都支持

• Does not require additional drivers or hardware
  不需要额外的驱动程序或硬件

• Easy to use - just select the device and start recording
  使用简单 —— 只需选择设备并开始录制

Cons:
缺点：

• Some protected streams (DRM content) cannot be recorded
  一些受保护的音频流（DRM 内容）无法录制

• Configuring devices may require some knowledge
  配置设备可能需要一定的知识

To date, this is the best way to record sound in Windows because it works out of the box and allows you to manage audio streams from individual devices. Its advantages can be assessed using the example of i-Sound Recorder. This is a lightweight but powerful program that supports loopback recording of streaming audio directly with parameters up to 96/24 and save it losslessly in WAV or FLAC formats.
到目前为止，这是在 Windows 上录制声音的最好方法，因为它开箱即用，并且允许你管理来自各个设备的音频流。其优势可以通过 i-Sound Recorder 这个例子来评估。这是一个轻量级但功能强大的程序，支持直接以高达 96/24 的参数进行回环 流媒体音频录制，并以 WAV 或 FLAC 格式无损保存。

6 How is it done on other operating systems?

6 在其他操作系统上是如何实现的？

Although this article is about Windows, it is worth mentioning how it works in other OS.
尽管这篇文章是关于 Windows 的，但值得一提的是它在其他操作系统中的工作方式。

On Linux:
在 Linux 上：

On Linux, everything is done via PulseAudio or PipeWire — system audio servers that can send output to a separate stream. There are graphical interfaces like Audacity, where you can select the source as “Monitor of Built-in Audio Analog Output” or “Null Output” via PulseAudio Volume Control.
在 Linux 上，所有操作都通过 PulseAudio 或 PipeWire 进行 —— 这些是系统音频服务器，可以将输出发送到一个单独的流。像 Audacity 这样的图形界面，你可以通过 PulseAudio 音量控制选择“内置音频模拟输出的监视器”或“空输出”作为源。

It works well, but requires a little technical training. Especially if you are hearing the word “sink” for the first time.
它效果很好，但需要一点技术培训。特别是如果你第一次听到“sink”这个词。

On macOS:
在 macOS 上：

Apple does not provide direct access to system sound due to security restrictions, so you have to install additional kernel modules (kernel extensions) to get sound before output. The most common options are BlackHole and Soundflower, special virtual devices that can be selected in QuickTime or GarageBand.
由于安全限制，苹果不提供对系统声音的直接访问，因此你需要安装额外的内核模块（内核扩展）来获取输出前的声音。最常见的选项是 BlackHole 和 Soundflower，这些是特殊的虚拟设备，可以在 QuickTime 或 GarageBand 中选择。

7 FAQ

7 常见问题解答

Why is my microphone recording instead of system audio?
为什么我的麦克风在录音而不是系统音频？

Because you selected the wrong source. Go to settings and select “Speakers” or “Stereo Mix”.
因为你选择了错误的源。去设置里选择“扬声器”或“立体声混音”。

Is it possible to record system audio without installing additional software?
不安装额外软件可以录制系统音频吗？

Only if you have Stereo Mix. Otherwise, you will need a recorder that supports loopback.
只有你有立体声混音才可以。否则，你需要一个支持回环的录音机。

How can I check if I have Stereo Mix?
如何检查我是否有立体声混音？

Go to sound settings > Playback devices > Right-click on an empty space > Show disabled devices. If you see Stereo Mix, activate it.
进入声音设置 > 播放设备 > 右键点击空白处 > 显示已禁用的设备。如果你看到立体声混音，就激活它。

Is it possible to record sound from a browser or YouTube?
可以从浏览器或 YouTube 录制声音吗？

Yes, if you use WASAPI Loopback. Then you get everything that is playing in the system.
可以，如果你使用 WASAPI 回环。那么你可以录制系统中播放的所有内容。

Is it possible to record several sources at once?
可以同时录制多个来源吗？

Yes, Windows allows you to redirect sound from several devices to one output device. You can also mix sound from different applications via virtual devices, such as VAC.
可以，Windows 允许你将多个设备的音频重定向到一个输出设备。你也可以通过虚拟设备（如 VAC）混合不同应用程序的声音。

What is WASAPI and why is it needed?
什么是 WASAPI，为什么需要它？

It is a modern sound management system in Windows. It provides direct access to audio streams and supports low-latency mode.
它是 Windows 中的一个现代声音管理系统。它提供对音频流的直接访问，并支持低延迟模式。

Is it possible to record sound in high quality?
可以高质量地录制声音吗？

Of course. Choose WAV or FLAC, and you will get lossless audio that can be used for archiving.
当然可以。选择 WAV 或 FLAC，你将得到可以用于存档的无损音频。

8 Conclusion

8 结论

Recording system audio used to be a chore. You’d plug in a cable, find Stereo Mix, install virtual devices, and pray that it wouldn’t break after an update.
录制系统音频曾经是一项繁琐的任务。你需要插入电缆，找到立体声混音，安装虚拟设备，并希望它在更新后不会出问题。

Recording the audio that comes through your sound card isn’t rocket science. It’s a common task, and modern tools do a better job than ever before.
通过你的声卡录制音频并不是火箭科学。这是一个常见的任务，现代工具比以往任何时候都做得更好。

Tools like i-Sound Recorder, with the right settings, make it easy and fast. No cables, no drivers, no headaches. The key is to understand what settings to use and how to choose the right input.
像 i-Sound Recorder 这样的工具，有了正确的设置，使用起来既简单又快速。无需电缆，无需驱动程序，无需头痛。关键是要了解使用什么设置以及如何选择正确的输入。

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via：

• How to Record Computer Audio in 6 Free Ways
  https://www.pcworld.com/article/2138817/how-to-record-computer-audio-in-6-free-ways.html
• How to Record Sound Directly from the Sound Card Output
  https://www.abyssmedia.com/isound7/record-from-sound-card.shtml