How To split / trim audio using olive video editor.

Import video and audio file in olive video editor. Play it in media viewer to check.
Drag and drop video on timeline. Play in sequence viewer.
Drag and drop audio below video track on timeline and play it in sequence viewer.
Take the playhead where you want to split the audio track. right click on it and click on split or hit ctrl + k on keyboard.
Click anywhere else then click on the audio part which you want to delete to select & hit delete key on keyboard.
To trim the audio take the mouse pointer at the end of the audio track & hover on it when mouse pointer changes in square bracket with two headed arrow.
Drag it towards on left side till it matches the end of the video.