Jun 27, 2011. The task was clear now. You can drag and drop audio files like mp3 or wav into the program interface, or use the File >Open dialog to do that. Super Smash Bros Melee Jpn Iso 9000. To merge two music files that you have added to Audacity do the following: Select one of the tracks with a left-click and press Ctrl-A afterwards to select all of it.