Sometimes when recording audio on your PC you may have a lot of unwanted background noise, static or feedback. Here I will show you how I fixed it on my computer. I am using Windows 7, so these instructions may or may not apply to Windows 8, Vista or XP.
1. First of all, check that your microphone connectors are properly connected and that your microphone cable is in good condition. Some headsets require a USB input for additional power, also make sure that cable is properly connected.
2. Then make sure the drivers for your soundcard or other sound related hardware are up-to-date. Instructions for this may vary depending on your hardware.
3. For the next step you should right click the speaker icon on your taskbar, usually located on the lower left of your screen. Select “Recording Devices”, on the “Recording” tab right click the microphone icon with a green checkmark symbol and select “Properties”.
While this part of the guide may work on other hardware, it is mainly for Realtek soundcards or integrated hardware. I tried it on my laptop which does not have Realtek and it did have similar options available.
Now go to the “Levels” tab in the “Microphone Properties” window. Make sure your microphone volume is at 100 and Microphone Boost is at 0 dB or +10 dB if you need the additional volume boost. If your Microphone Boost setting is too high, it may cause crackling and amplify background noises.
Next switch over to the Enhancements tab. Not everyone will have this exact tab, depending on your soundcard and sound drivers it may have a different name. Here you should make sure “DC Offset Cancellation” and “Noise Suppression” are checked, again they may have slightly different names depending on your hardware and drivers.
4. Lastly, if you are using a USB microphone, you probably won’t have any enhancement tab, and you may need to look up the manufacturer of your USB microphone and download additional drivers and software to enable noise suppression. For example, Samson USB microphones need to use a program called Sound Deck to enable noise suppression. Sound Deck may or may not work for other USB microphones, I have not tested it on others so I am unable to verify.
Additionally there is also free third party software that you can use to reduce noise after recording, such as Audacity.