If your computer doesn't have a microphone or you would like to use other microphones rather than the default one, you can use professional audio recording software. We know that most laptops have built-in microphone, but desktop PCs usually don’t have a microphone. Method 1: Record Sound on PC without Microphone Using Music Recorder
Method 2: Record Sound on PC without Microphone via Stereo Mix.Method 1: Record Sound on PC without Microphone Using Music Recorder.