Select some, 10 audio file or mor that are connected with its video

Could I in Videopad 4.40 select some audio that are connected with its video for disconnect from video?

Is there option as Ctrl + A in windows for clips Video/Audio on sequence

You can unlink the audio from the clips one at a time by right clicking each clip and selecting "Unlink from Audio"

This will leave each audio clip disconnected.

You can also do this from the video clip bin in which case the audio clip is copied to the Audio bin.

I don't think there is a way of unlinking ALL the clips in one go.

If you group the clips and try "Save Audio Clip as New File" only the audio section you click on from the group is saved.

Nat