how to fix the sound to my capture card to the pc

Try these steps in order:

1. Check the physical connection first.
   • Make sure the capture card is firmly connected to the PC.
   • Try a different USB port on the PC.
   • Check that the headset and any audio cables are fully plugged in.
   • If headphones are plugged in, unplug them once and test again, because audio output can change depending on what is connected.
2. Make sure Windows is using the correct output device.
   • Select the Speakers icon on the taskbar.
   • Select the arrow to open the list of audio devices.
   • Choose the device that should play sound.
   • If multiple devices appear, test each one.
3. Check that the device is not muted or disabled.
   • Right-click the Speakers icon on the taskbar and select Open Volume mixer.
   • Make sure none of the volume controls are muted.
   • Go to Start > Settings > System > Sound.
   • Select the audio device and open Device properties.
   • Make sure the Disable check box is cleared.
4. Check Device Manager for the audio device.
   • Select Start, type Device Manager, and open it.
   • Expand Sound, video and game controllers.
   • If the audio device appears, right-click it and select Enable device if that option is available.
   • If it does not appear, select View > Show hidden devices, then Action > Scan for hardware changes.
5. Update or reinstall the audio driver.
   • In Device Manager, expand Sound, video and game controllers.
   • Right-click the sound device and select Update driver.
   • Select Search automatically for drivers.
   • If that does not help, right-click the device again and select Uninstall device.
   • If prompted, select the option to remove or delete the driver software.
   • Restart the PC. Save open work first, because restart is required.
   • After restart, Windows should reinstall the driver automatically.
6. If Windows still does not detect audio, install the latest driver from the device manufacturer.
   • Go to the PC or sound card manufacturer’s support site.
   • Download the latest audio driver for the installed Windows version.
   • Install it and restart the PC.
7. Run the Windows audio troubleshooter.
   • On Windows 11, use the Get Help audio troubleshooter.
   • On Windows 10, start with the automated audio troubleshooter in Get Help.

If the problem started after a Windows update, try rolling back the audio driver in Device Manager > audio device Properties > Driver tab > Roll Back Driver.

References:

• Fix sound or audio problems in Windows
• Fix missing or undetected audio output device in Windows