adding a track...? not working the same

I have taken a break from recording for awhile but I remember that I could open up a file say an mp3 then put the cursor in a certain place and hit record and a new track would open below and I could start recording while the other file was playing talking over in some cases. im using beta 1.3 any ideas whats going on and what the heck is clean speech? Thanks

just want to be a little more specific…I import an mp3 that is my intro i want to start my talking a little before the end of it so I talk over the last few seconds of music fading When I import the mp3 I cannot even get the record button to light up and function at all…