I can no figure out how to adjust the audio volume on both imported files such as a song I imported that I wanted the actor to sing along with.  I also need to be able to adjust the sound of my own voice that i record for an actor to say.  I have searched everywhere and can not find a tutorial or help info on how to do this.  

The only thing I found was for background music & this is not background music.  it needs to sink with my actor but I don't know how to adjust the volume up or down