Sound effects can make the video scene more interesting. If you want to add special sound effects to your video, Wondershare Filmora (originally Wondershare Video Editor) can be a good choice. This video editing software is supplied with a small library of basic sound effects that you can easily use in your video. Just drag the effect you want to the timeline and shift the track around until it fits the scene.
1 Import the video file
Install and run this video editor. Then click the “Import” button to add the original video file to the program. Or directly drag and drop the file to the primary window.
2 Add sound effects to the video
Drag and drop the video file to the Video timeline. Then click the “Sound” button and in the window that appears, you'll see a box listing different sound effects. Just select a sound effect you want, such as “Alarm”, “Bell”, “Car” ect. and click the “Play” button to hear it.
To add the sound effect to the Timeline, choose the sound effect you want, hold your mouse and drag the sound effect down to the sound track below the video clip. Then the sound effect will be added as a new audio track for your clip.
After that, move the sound icon in the Timeline to set the beginning point of the sound effect audio clip and move the playhead to a point in the audio track to set the ending time. Click on the “Play” button to see if your video plays well with the added sound effect.
You can also edit the audio effect. To do it, just double click the sound effect and adjust the “Speed”, “Volume”, “Fade in” and “Fade out” effects as you like. If you want to remove the sound effect, click on the audio clip to highlight it and press the "Delete" key on your keyboard.
3 Export the new file
Give your video a final review to see if there are other ways to improve it. When you are satisfied with the results, it's time to export your work. Click the “Create” button, switch to the “Format” tab and specify a location and format to save it. You can also choose to save it to play on different devices such as iPhone, iPad, iPod, Zune, Xbox or directly upload to YouTube or Facebook. What’s more, you can even burn it to DVD for playing on home DVD player.