 In addition, because of their continuous presence in recordings and recital halls, the works from the standard repertoire are the most popular amongst the classical music audiences, and the performance of music that lies "outside the repertoire" generates much debate and discussion.The works in the repertoire have become need-to-know pieces for orchestral and solo instrumentalists, singers and conductors, as they encounter them in concert programs, competition requirements, and auditions, both for acceptance into academic institutions and working positions.As a result, much of the repertoire has become part of the teaching canon.