You record your screen in PowerPoint but the system audio — music, notifications, or video sound — is missing from the final file. This happens because PowerPoint’s screen recording tool captures only the microphone input by default. The system sound output is routed through a different audio channel that PowerPoint does not automatically record. This article explains why system audio is not captured and provides a step-by-step fix using Windows audio settings and PowerPoint’s recording options.
Key Takeaways: Enabling System Audio in PowerPoint Screen Recording
- Insert > Screen Recording > Audio > Record system audio: Toggle this option on before starting the recording to capture computer sounds.
- Sound > Recording tab > Stereo Mix > Enable: Windows must have Stereo Mix enabled as a recording device to route system audio to PowerPoint.
- Sound > Recording tab > Stereo Mix > Listen to this device: Do not enable this option — it causes echo and audio feedback during recording.
Why PowerPoint Does Not Record System Sound by Default
PowerPoint’s screen recording tool is designed to capture two audio sources: the microphone and the system audio. However, the system audio option is turned off by default. When you start a recording without enabling this option, PowerPoint records only the microphone input. The system audio — sounds from applications, web browsers, or media players — is not sent to PowerPoint’s recording engine.
Additionally, Windows routes system audio through a virtual audio device called Stereo Mix. Many Windows installations have Stereo Mix disabled by default. If Stereo Mix is disabled, PowerPoint cannot access the system audio stream even when the Record system audio option is turned on. The result is a video file with no background sounds.
Stereo Mix and Audio Routing
Stereo Mix is a Windows sound driver that captures every audio signal sent to your speakers. When enabled, it appears as a recording device in the Sound control panel. Applications like PowerPoint can use Stereo Mix as an audio input source. If Stereo Mix is missing or disabled, the system audio channel is not available to any recording software, including PowerPoint.
Steps to Enable System Audio Recording in PowerPoint
Follow these steps in order. The first step enables the recording option in PowerPoint. The second step ensures Windows provides the system audio stream.
Step 1: Enable Record System Audio in PowerPoint
- Open your presentation
Launch PowerPoint and open the slide where you want to insert the screen recording. You can also start a blank presentation. - Go to Insert > Screen Recording
On the ribbon, click the Insert tab. In the Media group, click Screen Recording. The recording control bar appears at the top of the screen. - Open the Audio menu
On the recording control bar, click the Audio icon. A drop-down menu shows two options: Record microphone and Record system audio. - Toggle Record system audio on
Click Record system audio so a checkmark appears next to it. Record microphone should also be checked if you want to narrate. If you only need system sound, uncheck Record microphone. - Select the recording area and start
Click Select Area and drag to choose the screen region you want to record. Press the Record button or press Windows logo key + Shift + R to start. After recording, press Windows logo key + Shift + Q to stop.
Step 2: Enable Stereo Mix in Windows Sound Settings
- Open Sound settings
Right-click the speaker icon in the system tray and select Sounds. Alternatively, go to Settings > System > Sound > More sound settings. - Go to the Recording tab
In the Sound window, click the Recording tab. You see a list of recording devices: Microphone, Line In, and possibly Stereo Mix. - Enable Stereo Mix if it is disabled
If Stereo Mix appears but is grayed out, right-click it and select Enable. If Stereo Mix does not appear at all, right-click any empty space in the list and check Show Disabled Devices. Stereo Mix then appears. Right-click it and select Enable. - Set Stereo Mix as the default recording device
Right-click Stereo Mix and select Set as Default Device. Do not set it as Default Communication Device unless you want audio chat applications to use it. - Do NOT enable Listen to this device
Right-click Stereo Mix, select Properties, go to the Listen tab. Uncheck Listen to this device. If this option is enabled, system audio plays through your microphone, causing echo in the recording. - Apply the changes
Click Apply and OK. Close the Sound window. Restart PowerPoint for the change to take effect.
Step 3: Test the Recording
- Play a test audio source
Open a browser and play a YouTube video or any audio file on your computer. - Start a screen recording in PowerPoint
With Record system audio enabled, record a short segment of the playing audio. - Play back the recording
Stop the recording and play the inserted video. You should hear the system audio clearly. If not, verify that Stereo Mix is enabled and set as Default Device.
If System Audio Still Does Not Record
PowerPoint Records Only Microphone Despite Enabling System Audio
This usually means Stereo Mix is not functioning correctly. Open the Sound control panel and go to the Recording tab. Speak into your microphone and watch the green bars next to Microphone. Play system audio and check if green bars appear next to Stereo Mix. If no bars appear, Stereo Mix is not capturing audio. Right-click Stereo Mix, select Properties, go to the Levels tab and ensure the volume slider is at 100 and not muted.
Stereo Mix Does Not Appear in the Recording Tab
Some sound drivers do not include Stereo Mix. This is common on laptops with Realtek or Conexant audio chips. In this case, install the generic High Definition Audio driver from your motherboard or laptop manufacturer. Alternatively, use a third-party virtual audio cable tool like VB-Cable to create a virtual recording device that mirrors system audio. After installing the virtual cable, set it as the default recording device and PowerPoint will detect it.
Recording Has Echo or Feedback
Echo occurs when Stereo Mix has the Listen to this device option enabled. Go to Sound > Recording > Stereo Mix Properties > Listen tab and uncheck Listen to this device. Also ensure your microphone is not positioned near your speakers during playback.
| Item | Record system audio ON | Record system audio OFF |
|---|---|---|
| Microphone audio | Recorded | Recorded |
| System audio (music, video, notifications) | Recorded | Not recorded |
| Stereo Mix requirement | Required and must be enabled | Not required |
| Use case | Tutorials with background music, software demos with sound effects | Narrated presentations without system sounds |
You can now record screen captures in PowerPoint that include both your voice and computer sounds. Before each recording session, verify that the Record system audio option is checked and Stereo Mix is enabled and set as the default device. For advanced users, consider using the Windows Game Bar (Windows logo key + G) as an alternative recording tool that also supports system audio capture without Stereo Mix configuration.