A sound card controls the computer's audio input and output. The card enables the PC to play and record sound. Sound cards either come integrated into the motherboard or are installed into an expansion slot. The speaker and microphone jacks on the side of a laptop or on the back of a desktop connect directly to the sound card.
To record audio with your sound card, connect a computer microphone to the audio jack and use an audio recording application like Sound Recorder.
Connect a microphone to the jack on the back of the desktop computer or into the mic jack on the side of the laptop.
Click "Start," then click "Accessories." Click "Sound Recorder." Click "Start Recording" to begin recording audio on your sound card.
Speak clearly into the microphone. The green bar indicates how loud or quiet the recording is; the farther the green bar is to the right, the louder the recording.
Click "Stop Recording" when you're done recording audio. Name the file and click "Save" to write the file to the hard drive.
If Sound Recorder doesn't pick up any audio from your microphone, right-click the speaker icon, found on the right side of the taskbar. Click "Recording devices." Click "Microphone." Click "Properties." Click the "Levels" tab. Move the slider below "Microphone" to the right to increase the volume. Click the speaker icon, if the icon is depressed, to unmute the mic.