How to Add Two Audio Tracks in Windows Movie Maker
Content provided by Microsoft
This article describes how to include a second audio track with a movie. Note that Microsoft Windows Movie Maker works with only one audio track at a time. You can add different audio files to a track and run them in sequence, but you cannot run them simultaneously. This article describes how to add a second audio track that will run simultaneously with the first track.
To add a second audio track:
Complete your project with the first audio track.
Save the project by clicking Save Movie on the File menu. This compiles the clips and audio track into a .wmv (movie) file.
On the File menu, click Import, and then locate the movie file you just saved. Click the file, and then click Open. This imports the file you just created, including the first audio track.
On the File menu, click Select All.
On the Clip menu, click Add to Timeline/Storyboard.