Pinnacle Studio Sound
With Pinnacle Studio, sound issues could arise for various reasons. One such issue is that sound is lost after a file is opened in Pinnacle Studio. Loss of sound could arise for various reasos such as the source file framerate.
Here is an example how a file from Camstudio could be imported to Pinnacle Studio without loss of sound.
For no loss of sound,
1) Open avi-flv-mp4-wmv converter.
2) Take an avi file from Camstudio >convert to mpg format with avi-flv-mp4-wmv converter.
3) Open the converted mpg file(made with same framerate as Pinnacle settings).
4) Edit the movie or combined clips. All sound will be intact.
An alternative to the sequence above is to record a new voice over for the entire movie.