注：本文為 “電腦音頻錄制 ” 相關合輯。
英文引文，機翻未校。
未整理去重，如有內容異常，請看原文。

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How to Record Computer Audio in 6 Free Ways

如何用 6 種免費方式錄制電腦音頻

Sponsored by EaseUS

Nov 28, 2023 4:34 am PST

Key Takeaways:

要點總結：

• 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 電腦上錄制音頻，Windows 10 有內置的聲音錄音機，可以通過簡單的點擊捕捉麥克風聲音。如果你使用的是較老的 Windows 系統（Windows XP/Vista），可以使用立體聲混音。

• 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.
  對于那些尋找開源電腦音頻錄音機的人來說，OBS 和 Audacity 是不錯的選擇。但要創造出高質量的聲音，你需要一個較長的學習過程。

• 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.
  為了方便，你可以使用像 EaseUS RecExperts 這樣的專業音頻錄音機，它支持捕捉電腦發出的內部和外部聲音，且無背景噪音。

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!
掌握如何錄制電腦音頻總是非常有幫助的，尤其是在你想要錄制播客、訪談、流媒體音樂、音頻通話等時。這篇文章將討論一些優秀的電腦音頻錄音機，并提供在電腦上錄制聲音的逐步指南。此外，你還將在這里探索一些聲音錄制的技巧。不多說，讓我們馬上開始吧！

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

方法 1. 如何完美錄制電腦系統和麥克風的音頻

• 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
  最適合：適合新手和專業人士在 PC 和 Mac 上進行多音頻源錄制和編輯

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 是一個理想的工具，可以錄制電腦的音頻，包括系統聲音、揚聲器、麥克風的外部音頻，或者同時錄制所有這些聲音。這意味著你可以輕松地錄制流媒體歌曲、自己的人聲或演講。此外，它還提供了一種特殊的靜音錄制模式，可以在電腦處于靜音模式時開始錄制聲音，這對于在相對安靜的環境中工作或學習的人來說非常合適。

In addition, it also provides other tools to help improve your recording experience and guarantee audio recording quality:
此外，它還提供了其他工具來幫助改善你的錄制體驗并保證音頻錄制質量：

• Start and stop recording music on your computer automatically
  自動開始和停止錄制電腦上的音樂

• Adjust the volume of your recording at any time during the recording
  在錄制過程中隨時調整錄制音量

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

• Save your audio recordings to MP3, OGG, WMA, and other audio files
  將你的音頻錄制保存為 MP3、OGG、WMA 等音頻文件

Here is how to use EaseUS RecExperts to record sound from a computer:
以下是使用 EaseUS RecExperts 錄制電腦聲音的方法：

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。 在你的電腦上啟動該軟件，點擊右上角的設置以調整音頻錄制參數。在這里，你可以自由選擇將電腦音頻錄制為 MP3、AAC、FLAC、OGG 或其他音頻文件。同時，選擇正確的 音頻比特率和采樣率 并點擊確定。

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。 點擊左側面板上的揚聲器圖標以選擇音頻源。如果你選擇系統聲音來捕獲電腦的內部聲音，你可以點擊旁邊的下箭頭選擇 靜音錄制。這意味著你可以在電腦處于靜音模式時錄制音頻文件。

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。 對于麥克風錄制，你還可以通過點擊下箭頭啟用高級錄制功能：麥克風增益和 麥克風降噪。啟用這些功能將保證高質量的音頻錄制。

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。 接下來，點擊 REC 開始在你的電腦上錄制音頻文件。完成后，你可以根據需要修剪或壓縮錄制的音頻文件。

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 上獨家錄制來自 PC 的聲音

• 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
  最適合：僅需要進行簡單聲音錄制任務且無需編輯功能的用戶，例如錄制唱歌、人聲等

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.
對于那些想要在 Windows 10 或 11 上錄制音頻文件且不安裝任何第三方軟件的用戶，Windows 語音錄音機（在 Windows 11 系統中現稱為 Windows 音頻錄音機）是一個很好的選擇。這款免費軟件可以在 3 個簡單的步驟內捕捉你電腦上的聲音，被認為是錄制自己唱歌、說話、錄制語音信息等的最簡單解決方案之一。

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頻，你可以直接通過 OneNote 錄制電腦音頻，以節省時間。

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 音頻錄音機錄制電腦聲音的步驟：

Step 1. Open the Start menu and enter Voice Recorder in the search box to open it.
第一步。 打開開始菜單，在搜索框中輸入語音錄音機以打開它。

Step 2. Next, click the blue microphone in the center to start your voice recording.
第二步。 接下來，點擊中央的藍色麥克風以開始你的語音錄制。

Note: For Windows 11 users, you need to hit the red button or use Ctrl + R to begin your audio recording.
注意： 對于 Windows 11 用戶，你需要點擊紅色按鈕或使用 Ctrl + R 來開始你的音頻錄制。

Step 3. To end your recording, click Stop. Once done, you can find the recordings saved in MP3 on your computer.
第三步。 要結束你的錄制，點擊停止。完成后，你可以在你的電腦上找到保存為 MP3 的錄制文件。

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

方法 3. 如何在 Windows 7 及更早版本上靈活錄制

• 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.
  最適合：需要在舊電腦上錄制音樂和歌曲的 Windows 用戶，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.
另一種從電腦上錄制你最喜歡的歌曲和音樂的方法是使用立體聲混音，這是由你的聲音驅動程序提供的一個特殊的電腦音頻錄音機。如果你的聲音驅動程序包含這個工具，你可以使用它來捕捉電腦發出的所有聲音，包括系統聲音、麥克風音頻、游戲音頻等。

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.
要使用立體聲混音在 Windows 電腦上捕捉聲音，你需要先了解一些 Windows 系統的基本設置，這將花費大約 20 到 30 分鐘。

Here is the tutorial for capturing audio on a Windows computer:
以下是 Windows 電腦上捕捉音頻的教程：

Step 1. Open the Control panel, then click Hardware and Sound > Sound.
第一步。 打開控制面板，然后點擊硬件和聲音 > 聲音。

Step 2. Next, in the window that appears, choose the Recording tab, where you can find the Stereo mix button.
第二步。 接下來，在出現的窗口中，選擇錄制選項卡，在那里你可以找到立體聲混音按鈕。

Step 3. Then, right-click Stereo Mix and choose Enable. Click OK to apply the changes.
第三步。 然后，右鍵點擊立體聲混音并選擇啟用。點擊確定以應用更改。

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

方法 4. 如何通過 Audacity 免費在電腦上錄制音頻

• 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.
  最適合：想要免費專業錄制和編輯音頻以制作歌曲、播客等的用戶。

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.
如果你喜歡一個免費且專業的工具來錄制電腦音頻，看看 Audacity。作為最受歡迎的 音頻捕捉軟件 之一，它被廣泛用于任何聲音錄制的目的，包括錄制人聲、創作歌曲、捕捉語音通話等。

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.
這款免費軟件的功能包括捕捉系統音頻、同時錄制多個音軌、對錄制應用濾鏡等。這意味著你可以一次性錄制和編輯你的音頻文件，然后將它們導出為 MP3 或其他格式。如果你只是使用這款免費軟件進行基本的音頻或人聲錄制，你可以在打開它后立即開始任務。然而，要創建高質量的音樂文件，你需要花時間學習高級設置并安裝必要的插件。

Here is how to record internal and external sound from a computer using Audacity:
以下是使用 Audacity 從電腦錄制內部和外部聲音的方法：

Step 1. Download and install Audacity on your computer, then open it.
第一步。 在你的電腦上下載并安裝 Audacity，然后打開它。

Step 2. Click the Audio Setup option in the top toolbar and click Host > Windows WASAPI.
第二步。 點擊頂部工具欄中的音頻設置選項，點擊主機 > Windows WASAPI。

Step 3. Next, choose the Audio Setup button again to select the recording device.
第三步。 接下來，再次點擊音頻設置按鈕以選擇錄制設備。

Step 4. Then, click the red circle button to begin your recording.
第四步。 然后，點擊紅色圓形按鈕開始你的錄制。

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。 一旦你的音頻錄制完成，點擊文件 > 導出，將你的音頻錄制保存為 MP3、WAV 或 OGG 格式。（默認情況下，你的音頻錄制將保存為 MP3 格式。）

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

方法 5. 如何在 Mac 上免費使用 OBS 錄制電腦音頻

• 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
  最適合：想要在各種平臺上進行音頻錄制和流媒體的高級用戶

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 是另一個完全免費的工具，可以幫助你捕捉來自你的 PC、Mac 或 Linux 的聲音。這款軟件使你可以靈活地選擇你的目標音頻源，如系統聲音、采集卡聲音、麥克風聲音等。此外，它還為那些想要在這里創作精彩歌曲的專業音樂創作者提供了調整音頻比特率、采樣率和聲道的選項。與 Audacity 類似，這款免費軟件也允許你在需要時安裝插件。

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，由于其復雜的用戶界面，使用這個免費音頻錄音機有點困難。根據我們團隊的測試統計，初學者需要一個較長的學習過程（3 - 4 小時用于基本設置和功能）來掌握這個工具。

Now, let’s see how it works for recording computer audio on Mac and Windows:
現在，讓我們看看它在 Mac 和 Windows 上錄制電腦音頻是如何工作的：

Step 1. Install and launch OBS Studio on your PC or Mac.
第一步。 在你的 PC 或 Mac 上安裝并啟動 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。 接下來，在窗口的左上角，點擊文件 > 設置 > 音頻，以設置你的音頻設備輸入。此外，點擊輸出以選擇你的錄制的音頻格式。

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。 這款免費軟件默認同時錄制可見屏幕和音頻。要僅錄制電腦音頻，你需要點擊眼睛符號以禁用視覺捕捉。

Step 4. When everything is ready, click Start Recording to begin capturing PC audio now.
第四步。 當一切都準備好了，點擊開始錄制以開始捕獲 PC 音頻。

Method 6. How to directly start recording computer audio online

方法 6. 如何直接在線開始錄制電腦音頻

• Compatibility: web-based (Windows & macOS & Linux)
  兼容性：基于網絡（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.
  最適合：想要直接在電腦音頻上錄制歌曲和人聲且不使用任何應用程序的 Windows 和 Mac 用戶。

For those who want to record computer audio on a PC or Mac without any app, Chrome Audio Capture should be the first choice.
對于那些想要在 PC 或 Mac 上錄制電腦音頻且不使用任何應用程序的人來說，Chrome 音頻捕捉應該是首選。

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.
它被認為是錄制來自 PC 或筆記本電腦音頻的最簡單方法之一。無論你是要從你的揚聲器、電腦內部音頻或其他來源捕捉音頻，你都可以使用這個擴展輕松完成任務。

Here is how to record computer audio online:
以下是在線錄制電腦音頻的方法：

Step 1. Add the Chrome Audio Capture extension.
第一步。 添加 Chrome 音頻捕捉擴展。

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。 選擇你想要捕捉的音頻輸入并點擊開始捕捉。要結束錄制，你可以按下鍵盤上的 Ctrl + Shift + X 快捷鍵。

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

額外福利：如何高質量地錄制電腦聲音

To help you create a high-quality audio recording on your PC or Mac, you can take a glance at the useful tips below:
為了幫助你在 PC 或 Mac 上創建高質量的音頻錄制，你可以看看下面的有用提示：

1. Choose an excellent computer audio recorder

1. 選擇一款出色的電腦音頻錄音機

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，一款專業的電腦音頻錄音機是必須的。在選擇工具時，你需要關注它的錄音選項，如麥克風聲音、電腦內部音頻、聲卡等。

2. Use A good microphone

2. 使用一個好的麥克風

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.
大多數用戶喜歡使用筆記本電腦內置的麥克風來錄制電腦音頻，因為它很方便。然而，由于距離的原因，質量無法保證。所以，你最好找一個專業的外接麥克風來錄制。

3. Create a quiet environment

3. 創造一個安靜的環境

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（如說話、打字、咳嗽等）都會影響你的音頻錄制質量。因此，你還需要選擇并創造一個相對安靜的環境，以便用麥克風錄制電腦聲音。

How to record computer audio FAQs

如何錄制電腦音頻常見問題解答

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

1. 如何從我的電腦瀏覽器錄制音頻？

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!
要快速從你的電腦瀏覽器錄制音頻，你可以選擇使用一些在線電腦音頻錄制器擴展，如 Chrome 音頻捕捉、Notta 等。你只需要安裝這個工具并選擇你想要捕捉的音頻源。就這樣！

2. Can I record streaming audio on my computer?

2. 我可以在我的電腦上錄制流媒體音頻嗎？

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.
當然可以！只要你有合適的流媒體音頻錄制器，你就可以在你的電腦上錄制流媒體音頻。例如，EaseUS RecExperts 將幫助你在你的 Windows 或 Mac 電腦上捕獲流媒體音頻。此外，它還可以將錄制內容導出為多達 10 種不同的格式，以便后續分享。

3. Does Windows 10 have an audio recorder?

3. Windows 10 有音頻錄制器嗎？

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.
當然有！你的 Windows 10 系統有一個內置的音頻錄制器，它叫做語音錄制器。這個免費軟件將幫助你從你的電腦捕捉麥克風聲音。請記住，它無法錄制電腦內部的聲音。

4. Can QuickTime record computer audio?

4. QuickTime 可以錄制電腦音頻嗎？

Yes. QuickTime can record computer audio on a Mac device.
是的。QuickTime 可以在 Mac 設備上錄制電腦音頻。

For recording external sound from a microphone on a computer, you just need to follow the on-screen instructions to make it.
對于從電腦麥克風錄制外部聲音，你只需要按照屏幕上的說明進行操作。

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，要錄制電腦的系統音頻，你需要安裝一個名為 Soundflower 的額外插件，然后你就可以開始錄制了。

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How to Record Internal Audio on Windows?

如何在 Windows 上錄制內部音頻？

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?
如果你曾經嘗試錄制你耳機里播放的內容 —— 不管是 Twitch 直播還是瀏覽器里的音樂 —— 你可能遇到了一個問題：如何直接捕獲系統聲音？

It would seem that the computer itself plays it. So, it should be able to save it. But no. It’s not that simple.
似乎電腦本身就在播放它。所以，它應該能夠保存它。但事實并非如此。這并不簡單。

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”.
錄制通過你的聲卡的聲音是一項隨著時間而變化的任務。從電纜和模擬連接到“開箱即用”的軟件解決方案。

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.
我已經研究這個話題很長時間了。我測試了所有的東西：從舊方法到 Windows 中的現代 API。所以，讓我們來搞清楚以前是如何做到的，為什么這些方法已經過時，以及現在哪些工具有效，無需不必要的魔法。

1 AUX cable - the good old way

1 AUX 電纜 —— 老辦法

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，過去，人們會簡單地使用一個 3.5 毫米立體聲電纜來從電腦錄制音頻，將聲卡的輸出連接到麥克風輸入。

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.
這是最簡單的方法，每個人都可以使用。你會將揚聲器連接到一個端口，將外部錄音機連接到另一個端口，然后，聲音就進去了。

But there were two big downsides:
但有兩個很大的缺點：

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，是質量。你實際上是在進行一次數字到模擬的轉換，然后再轉回去。每次轉換都會增加噪音并丟失細節。特別是如果你的 DAC（數字到模擬轉換器）很弱 —— 而大多數預算聲卡正是如此。

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，你在錄制時無法用耳機聽。因為其中一個端口被電纜占用了。從理論上講，可以將一個 Y 分離器連接到聲卡的輸出端，并通過它連接耳機，但我找不到任何出售的，只好自己焊接。另一個選擇是使用第二塊聲卡，但這個選項是在后來出現的，當時集成聲卡開始安裝在主板上。

In general, this option was no worse than recording sound on a good tape recorder. But today we can do it much better.
總的來說，這個選項并不比用一臺好的磁帶錄音機錄制聲音差。但今天我們可以做得更好。

2 Stereo Mix - Trying to Record Digitally Inside the System

2 立體聲混音 —— 嘗試在系統內部數字錄制

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.
立體聲混音 是一些聲卡制造商在其驅動程序中添加的一個功能。它允許所有輸出的音頻被數字捕獲，無需任何模擬轉換。

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，如果你播放電影、音樂或游戲，立體聲混音會在信號到達揚聲器之前將其捕獲，并將其路由到錄音機。這比使用電纜是一個很大的進步。

The upside to this method was that the audio remained clean, without any loss of quality. It was simply routed inside the system.
這種方法的優點是音頻保持干凈，沒有任何質量損失。它只是在系統內部被路由。

But there were downsides:
但也有缺點：

• Not all sound cards support Stereo Mix
  并非所有聲卡都支持立體聲混音

• The name may vary depending on the manufacturer (e.g. “Wave Out” or “What U Hear”)
  名稱可能因制造商而異（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 的壓力，微軟開始移除這個功能，因為它可以被用來繞過 DRM

• It only works with one device.
  它只與一個設備一起工作。

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.
當時這是一個突破，但只有少數幸運的人可以使用。因為這個方法只有在你的驅動程序足夠幸運時才能工作。而且，如果你使用的是帶有集成聲卡的現代筆記本電腦，你可能根本找不到立體聲混音。

3 Virtual sound card - software replacement for physical

3 虛擬聲卡 —— 物理設備的軟件替代品

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.
當制造商開始移除立體聲混音時，第三方開發者找到了他們的方法 —— 他們創建了虛擬聲卡。這些程序模擬一個音頻輸出設備，但不是將信號發送到揚聲器，而是將其傳遞給一個錄音程序或直接寫入磁盤。

Examples of such solutions: VB-Cable, Voicemeeter, Virtual Audio Cable.
此類解決方案的例子：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.
它們的工作原理如下：你安裝一個虛擬設備，如“Cable Input”或“VAC Line In”，將其設置為默認輸出，系統中播放的所有內容都開始以純數字信號的形式進入錄音機。

Pros:
優點：

• No loss of quality
  無質量損失

• You can capture sound from any source
  你可以從任何來源捕獲聲音

• Ability to mix multiple audio streams
  能夠混合多個音頻流

Cons:
缺點：

• Often requires manual configuration
  通常需要手動配置

• Compatibility with some programs may not be ideal
  與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.
創建一個可靠的驅動程序并非易事。即使是經過數年測試的解決方案有時也會出現問題。更不用說那些只與原生軟件兼容且不符合所有規范的低質量仿制品了。通常，這些虛擬設備會導致音頻軟件運行失敗，甚至可能導致藍屏死機。

Universal solutions, such as VAC, allow you to flexibly redirect audio streams between individual devices, but require painstaking configuration, sometimes by trial and error.
通用解決方案，如 VAC，允許你在各個設備之間靈活地重定向音頻流，但需要精心配置，有時甚至需要通過反復試驗。

4 Code injection - not a good idea

4 代碼注入 —— 并非好主意

There is another method that is more related to hacking than to normal audio work.
還有一種方法，與其說它與正常的音頻工作有關，不如說它與黑客行為有關。

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.
一些開發者開始使用代碼注入應用程序來攔截對音頻驅動程序的調用。也就是說，該程序直接加載到瀏覽器、媒體播放器或 Skype 的地址空間中，并在聲音輸出之前讀取它。我只遇到過一個使用這種技術的應用程序 —— Skype 通話錄音機，但它的網站現在已經不存在了。

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.
聽起來像病毒世界的技術？沒錯，因為這和間諜軟件做的事情幾乎一樣。因此，殺毒軟件經常阻止這類程序，使用它們并不是最安全的選擇。

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，這種方法只在 Windows 的舊版本上有效。在新版本中，系統會阻止以這種方式訪問音頻流，這些工具要么無法工作，要么會導致藍屏死機。

5 Loopback recording - a Windows standard

5 回環錄制 —— Windows 的標準方式

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.
隨著 Windows Vista 的問世，微軟終于正式解決了錄制系統聲音的問題。他們實現了回環錄制，允許你直接以數字形式捕獲揚聲器上播放的所有內容。也就是說，你只需在聲音設置中選擇“揚聲器”設備，所有播放的內容都可以被錄制。

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.
這得益于 Windows 中的一種新的聲音管理技術 WASAPI 回環。現在，無論你使用的是哪種芯片組，Realtek、Creative 還是 Intel，一切都能正常工作。

Pros:
優點：

• Supported by all modern sound cards
  所有現代聲卡都支持

• Does not require additional drivers or hardware
  不需要額外的驅動程序或硬件

• Easy to use - just select the device and start recording
  使用簡單 —— 只需選擇設備并開始錄制

Cons:
缺點：

• Some protected streams (DRM content) cannot be recorded
  一些受保護的音頻流（DRM 內容）無法錄制

• Configuring devices may require some knowledge
  配置設備可能需要一定的知識

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.
到目前為止，這是在 Windows 上錄制聲音的最好方法，因為它開箱即用，并且允許你管理來自各個設備的音頻流。其優勢可以通過 i-Sound Recorder 這個例子來評估。這是一個輕量級但功能強大的程序，支持直接以高達 96/24 的參數進行回環 流媒體音頻錄制，并以 WAV 或 FLAC 格式無損保存。

6 How is it done on other operating systems?

6 在其他操作系統上是如何實現的？

Although this article is about Windows, it is worth mentioning how it works in other OS.
盡管這篇文章是關于 Windows 的，但值得一提的是它在其他操作系統中的工作方式。

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，所有操作都通過 PulseAudio 或 PipeWire 進行 —— 這些是系統音頻服務器，可以將輸出發送到一個單獨的流。像 Audacity 這樣的圖形界面，你可以通過 PulseAudio 音量控制選擇“內置音頻模擬輸出的監視器”或“空輸出”作為源。

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，但需要一點技術培訓。特別是如果你第一次聽到“sink”這個詞。

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，蘋果不提供對系統聲音的直接訪問，因此你需要安裝額外的內核模塊（內核擴展）來獲取輸出前的聲音。最常見的選項是 BlackHole 和 Soundflower，這些是特殊的虛擬設備，可以在 QuickTime 或 GarageBand 中選擇。

7 FAQ

7 常見問題解答

Why is my microphone recording instead of system audio?
為什么我的麥克風在錄音而不是系統音頻？

Because you selected the wrong source. Go to settings and select “Speakers” or “Stereo Mix”.
因為你選擇了錯誤的源。去設置里選擇“揚聲器”或“立體聲混音”。

Is it possible to record system audio without installing additional software?
不安裝額外軟件可以錄制系統音頻嗎？

Only if you have Stereo Mix. Otherwise, you will need a recorder that supports loopback.
只有你有立體聲混音才可以。否則，你需要一個支持回環的錄音機。

How can I check if I have Stereo Mix?
如何檢查我是否有立體聲混音？

Go to sound settings > Playback devices > Right-click on an empty space > Show disabled devices. If you see Stereo Mix, activate it.
進入聲音設置 > 播放設備 > 右鍵點擊空白處 > 顯示已禁用的設備。如果你看到立體聲混音，就激活它。

Is it possible to record sound from a browser or YouTube?
可以從瀏覽器或 YouTube 錄制聲音嗎？

Yes, if you use WASAPI Loopback. Then you get everything that is playing in the system.
可以，如果你使用 WASAPI 回環。那么你可以錄制系統中播放的所有內容。

Is it possible to record several sources at once?
可以同時錄制多個來源嗎？

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 允許你將多個設備的音頻重定向到一個輸出設備。你也可以通過虛擬設備（如 VAC）混合不同應用程序的聲音。

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

It is a modern sound management system in Windows. It provides direct access to audio streams and supports low-latency mode.
它是 Windows 中的一個現代聲音管理系統。它提供對音頻流的直接訪問，并支持低延遲模式。

Is it possible to record sound in high quality?
可以高質量地錄制聲音嗎？

Of course. Choose WAV or FLAC, and you will get lossless audio that can be used for archiving.
當然可以。選擇 WAV 或 FLAC，你將得到可以用于存檔的無損音頻。

8 Conclusion

8 結論

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.
錄制系統音頻曾經是一項繁瑣的任務。你需要插入電纜，找到立體聲混音，安裝虛擬設備，并希望它在更新后不會出問題。

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.
通過你的聲卡錄制音頻并不是火箭科學。這是一個常見的任務，現代工具比以往任何時候都做得更好。

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 這樣的工具，有了正確的設置，使用起來既簡單又快速。無需電纜，無需驅動程序，無需頭痛。關鍵是要了解使用什么設置以及如何選擇正確的輸入。

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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