More people now listen to the music that originates in the Central European tradition than ever before-frequently not in the concert hall but on records, tapes, radio and television. A major part of the music broadcast consists of relays of previously recorded material. This separation of the performer from his performance and a large part of his audience is the most dramatic and revolutionary change that has taken place since music began. It has led many listeners to expect music of the highest quality at the touch of a switch. The use in the studio of various technical devices and the 'construction' of a performance, by assembling a number of separate recorded sections can achieve perfection of execution, not possible in the concert hall, arousing in many listeners expectations that can only be satisfied by listening to recorded performances. This way of making music also has an effect on the performer.