Adobe audition software, why can't I record sound when I record? The microphone is fine.

On the recording control panel, click Options, and then,

Attribute? /? Mixer (menu), select the sound card and input: "Realtek? Hd? Audio? Enter "? Then, in "Show the following volume controls", remove the check mark of the item "Stereo Mix", check the item "Microphone", and click OK to exit.