I have a song - Fighter (Chritine Aguillera) that has a beginning containing both strings and piano.  I’d like to get this part close for live performances.  However, it can not be played by one person.  My idea is to pre-record the string part and play it back live while at the same I would play the piano part with it.  I originally thought I could do this with a performance but it sound like I can’t.  Is there another mode that I could do this with?