Is a musical performance “historically informed”? Does it do justice to the “original sound”? Is it even possible to truly experience the “original idea” behind a composition when it is performed with “modern instruments”? We are familiar with questions such as these in connection with the interpretation of so-called early music. On this double album they are rigorously applied to so-called new music. Milestones of electroacoustic music – from Varèse’s Poème électronique (1958) to Ferneyhough’s Mnemosyne (1986) – are investigated from a music-historical perspective and presented in a contemporary 5.1 surround edition.