How to Switch Your Recording Input from Stereo Mix to a Microphone

Stereo Mix is a virtual recording device that captures whatever your computer is playing. If it is set as the default input device, apps record system audio instead of your voice. This guide shows how to make a physical microphone the active input on Windows and how to undo the change later.

Before you start

• The switch happens entirely on your computer. It changes Windows sound settings and does not need an online service or account.
• Connect the microphone first. USB microphones and headsets usually appear as their own device, while analog mics plug into the mic or combo jack.
• Note which device is currently the default. That lets you switch back to Stereo Mix later if you still need to record system audio.
• Stereo Mix is provided by some audio drivers, often Realtek. Not every computer shows it, and its name can vary by driver.

Step-by-step instructions

Option 1: Use Windows Settings

• Open Settings and go to System, then Sound.
• Find the Input section. In Windows 11 it is labelled Choose a device for speaking or recording. In Windows 10 it is labelled Choose your input device.
• Select your microphone instead of Stereo Mix.
• Speak and watch the volume meter for that device. If it moves, Windows is hearing the mic.

Option 2: Use the Sound control panel

The classic Sound control panel gives more control. It handles default communication devices and level settings, and it lets you disable Stereo Mix.

• Open the Sound control panel. In Windows 11, go to Settings, System, Sound and choose More sound settings. In Windows 10, use the Sound Control Panel link on the Sound settings page. You can also type mmsys.cpl in the Run dialog.
• Open the Recording tab.
• Right-click your microphone and choose Set as Default Device.
• Right-click it again and choose Set as Default Communication Device. Video call apps that follow the communication default will then use the mic as well.
• If you no longer want Stereo Mix selected by accident, right-click it and choose Disable. This is reversible: right-click an empty area, enable Show Disabled Devices, then right-click Stereo Mix and choose Enable.
• Click OK to save.

Option 3: Change the input inside the app

Many recording, streaming and video call apps have their own microphone setting that can override the Windows default. If an app was set to Stereo Mix directly, changing the system default will not affect it. Open that app's audio or device settings and select the microphone there. The exact location differs between apps and versions.

Check the output

• In the Recording tab, speak into the microphone and watch the green level bar next to it. The bar beside Stereo Mix should only move when the computer is playing sound.
• Make a short test recording with a built-in recorder app or the app you plan to use. Then play it back to confirm you hear your voice and not system audio.
• If your voice is too quiet or distorted, open the microphone's Properties and adjust the input level on the Levels tab. Some drivers also show a Microphone Boost slider there. Higher boost also raises background noise.
• The Advanced tab in Properties shows the default format, including the sample rate. If an app reports a format mismatch, try a common rate such as 48000 Hz or 44100 Hz that both the device and the app support.

Common problems and next steps

The microphone does not appear in the list. In the Recording tab, right-click an empty area and enable both Show Disabled Devices and Show Disconnected Devices. If the mic is disabled, enable it. If it still does not appear, reconnect it, try another port, or check that its driver is installed in Device Manager.

The meter moves, but apps get no sound. Check microphone privacy settings. In Windows 11, go to Settings, Privacy & security, Microphone. In Windows 10, go to Settings, Privacy, Microphone. Make sure microphone access is on for the device and allowed for the app.

An app still records system audio. That app is probably set to Stereo Mix in its own settings. Change the input there, or disable Stereo Mix so the app cannot select it.

You hear yourself or an echo. Open the microphone's Properties, go to the Listen tab and turn off Listen to this device unless you want monitoring. Also make sure your speaker output is not being picked up by the mic.

Stereo Mix becomes the default again. A driver update or a newly connected device can change the default input. Repeat the Set as Default Device step and disable Stereo Mix if you do not use it.

You need your voice and system audio together. Switching the default input only selects one device. To capture both, use an app that can record several sources at once, or a virtual audio mixing tool. Check that tool's documentation for how it handles your files and audio data.