Audio tracks contained in the video files are usually called Sound Tracks.

MySoundStudio lets you open existing video files and edit sound tracks saved there. It also lets you record and add new tracks or import existing sound files into the video files in the same way you usually edit sound files in MySoundStudio.
Once you are done with editing sound tracks, you can save them back to the original video file or save them in the other video file format.

In this lesson, you will edit sound tracks in a video file saved in AVI format, Windows standard video file format.

1. Choose File - Open.
   The Open dialog box appears.
   
   
2. Locate and open the file nosound.avi in the Tutorial folder.
   Video frames are displayed on the top of the multi-track window. If video frames are not displayed, choose View - Video Track.
   
   
   
3. Choose View - Video Preview.
   A window oepns and displays current video frame.
   
   
   
   When you play the file, the video starts playing in the Video Preview window.
   

When playing a video file, your PC is actually displaying a series of bitmap images in succession. The number of still images played per second is called Frame Rate.

1. Choose View - Ruler Units.
   The Ruler Units dialog box appears.
   
   
2. In the Time section, select Frame, input 15 as shown below and click OK.
   
   
   
   Notice that the Time Ruler updates to reflect the new measure.
   
   

MySoundStudio allows you to add sound data to the video file not containing waveform data. You can edit imported sound in the video file as you usually edit sound files.
If the video file has existing sound data, you can add new tracks to the file and edit them.

1. Choose File - Import, and import the file soundtrack.wav in the Tutorial folder.
   
   
   
   
2. Choose Controller - Play.
   Make sure that video frames and sound are played at the same time.

1. Choose File - Export. In the Save In dropdown list, choose Data folder located in the same folder as MySoundStudio application (usually it is stored on Program Files\MySoundStudio folder).
   
   
2. Type withsound.avi in the File Name, and click Save as shown below.
   
   
   
   The Compression Options dialog box appears.
   
   
3. Accept the default settings and click OK.
   
   
   
   
4. In a few moments, the following dialog appears, Click OK.
   
   
   
   
5. The file withsound.avi opens in the multi-track window. Play this file and check the result.