You will be offered to use the Setup Wizard to record the song.
There are 2 ways of settings available.

I) With the help of Setup Wizard

Click on "Yes" when you are offered to use the Setup Wizard.

Click on "Proceed".

Then click on "Continue".

Allow access to your camera and microphone and click on "Continue".

Click on "Begin Scan".

In the dropdown list of found cameras choose "ManyCam Virtual Webcam" and proceed to the next step (click on "To Step 2").

Click on "Begin Scan".

In the dropdown list of found microphones choose "ManyCam Virtual Microphone" and proceed to the next step by clicking on "Continue".

Check your computer speed and proceed to the next step.

Check the upload speed and click on "Continue".

Save your settings and proceed to the recording of the song.

II) Without using the Setup Wizard

Click on "No" when you are offered to use the Setup Wizard.

Allow access to your camera and microphone.

Automatically defined cameras are shown on the right.

Change the Microphone as it is shown on the picture below.

If something went wrong please use the Setup Wizard