In AVS Video Editor project audio clips can be overlapped.

Note: you cannot add transitions between two audio clips. The length of time the two audio clips play together is determined by the amount of overlap between the two clips. When two audio clips overlap, the volume of each audio clip is lowered by 50 percent during the part where they overlap. Two audio clips cannot completely overlap and play together. To start editing audio please click the Add Audio button in Create Movie menu pane.

To add any audio select the desired track reflected in the Media Library and drag it to the workspace which is represented in Timeline view.

Note: you can select the tracks view type between Thumbnails or List.

Follow the steps below:

1. Select Add Audio button in Create Movie menu pane.
2. Navigating among audio tracks reflected in the Media Library select the desired track icon.
3. Drag and drop it to the workspace.
4. Set boundaries of audio on the Timeline.
5. Preview the result using Main Preview window.

AVS Video Editor has a great feature of editing audio tracks with advanced AVS Audio Editor included into the installation or any of the audio editors installed on your computer. You can select the audio editor to be used in the Audio section of the Environment Settings... Main Menu item or using the Audio Settings button in the Timeline menu. To start expanded audio editing with AVS Audio Editor please click the Edit in Audio Editor button or press F4 key.

You can adjust the audio levels between the two audio tracks (the audio that was recorded as part of a video clip on the video track and the audio that was recorded or imported and added to the audio track). Adjusting the audio levels determines which audio will play louder than the other. The default setting plays the audio in both tracks at equal levels. The audio levels you select will play throughout the entire portion of your movie. By adjusting the audio levels, it could be set so that dialog in your video clip can be heard over the music that plays in the background. To adjust audio levels please use Audio Balance slider at the Timeline Main Video section. Drag the slider and use the pop-up tip to set necessary audio level.

Note: you can apply not one but several tracks. If you want to disable any audio track, check the respective window off clicking the icon. The active audio track is highlighted.