With the MAGIX Movie Studio Platinum 15.0 video editor, where can I set it to not mute audio when divided into 3 parts of a 1-hour video?

I make a 1-hour video with a camcorder every week, splitting the recording into 3 23 minute files on the SD card. Many times I break the video while talking, when I edit the videos together with the program (MAGIX Movie Studio Platinum 15.0), I don't understand what the speaker says at the break. How can I set the sound to not mute before breaks?