How to record both microphone and computer audio together during recording (Windows Vista, 7, 8)
Click the Settings button on the oCam main screen.
After the Settings window opens, click the Recording tab on the left, check the Audio Device Settings checkbox, and select the device as WASAPI (loopback). (Since this is set as the default, it is recommended to leave it as is unless there is a special case.)
Go to Control Panel through the Start menu and click the Sound icon.
When the Sound Settings window opens, click the Recording tab to see the microphone item as shown below.
Select the microphone item, right-click it, and click Properties.
In the Microphone Properties window, click the Listen tab.
Check the โListen to this deviceโ checkbox, then click the Apply button.
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How to Record Microphone Audio While Recording Video (Windows XP)
For Windows XP, operation may not be normal because Microsoft has ended support for this operating system. (Reference)
In the Windows Control Panel, click Sounds and Audio Devices.
The Sounds and Audio Devices Properties window will appear. Click the Advanced button.
The Volume Control window will appear. Click Options - Properties from the menu.
When the Properties window appears, select the Recording radio button, check the Microphone Volume checkbox, and then click OK.
A new window will appear as shown below. Check the Select checkbox under Microphone Volume.
After closing the window, go back to Control Panel - Sounds and Audio Devices - Advanced, then click Options from the menu.
Then, this time, click the Playback radio button, check the Microphone Volume checkbox, and click OK.
Under Microphone Volume, clear the Mute checkbox.