This edition allows you to work through the piece systematically and at different tempi with accompaniment.  The CD begins with the concert version of each movement.  You will then hear the piano accompaniment at slow and medium tempo for practice purposes.  At slow tempo you can also hear the violin played softly in the background as a guide.  The practice tempos give you time to play a very short cadenza in each movement concerned;  the entrance following the cadenza can be found with the aid of a metronome click.  All of the versions were recorded live.  Further information can be found at http://www.dowani.com/idea/