Adding music to your iMovie Project

STEP 1
Upload your desired music track into iTunes.
STEP 2
Open a previous iMovie project or create a new iMovie project.
STEP 3
In iMovie on the right hand side click on the music and sound effects button.(Looks like a grey music icon.)
musical_note_ck.png
STEP 4
In the audio source box, select the location of your desired music track.
STEP 5
A - Click and drag the file over to the video timeline.
B - Click and drag the file to the background area to make it last as long as the entire iMovie project.
STEP 6
Adjust and edit the song as needed.