Adjust audio function can only be used for movie that export for conversion. When such a movie is put in Timeline, you can click to adjust volume and replace audio as follow: And the effect can be showed in the media player.
Mute: Check the box to set the movie muted.
Volume: To turn up or turn down the volume of the movie.
Replace Audio: Enables you to add audio to source video file so that you can replace the original audio track with favorite background music or funny dubbing.
Check the box of "Replace Audio ", and then hit the browse button to select the audio file you want to add. And make sure the checkbox for "Loop" is ticked, if you want the audio to play continuously when the new audio is shorter than the video. After that, click “OK”.
Accepted audio file format: *.mp3 *.aac *.ac3 *.ts *.tp *.trp *.m2ts *.mpg *.mpeg *.vob *.m4v *.mov *.mp4 *.mkv *.mp3 *.flv *.avi *.divx *.3gp *.mwv *.wma *.m4a *.mp2 *.mpa *.aac *.wav *.au *mp2 *.ac3 *.flac *.ape *.ogg *.8svx *.aiff *.aif *.caf *.dts *.smv *.tta *.voc *.goa.
Some settings about Adjust Audio.
Reset: Click to reset to default values.
Apply to All Movies: Get all the movies applied to the changed effect.