The most important is the source. The source is an unedited analogue master tape. The source of AAD is entirely identical with that of vinyl record. AAD is a digital copy of the master tape.
    In order to reduce the number of conversions and avoid any additional manipulation, we used direct master recording for digital conversions: One is STUDER A80 reel-to-reel tape recorder once used in professional studio from Analogue time. One is HHB CDR-830 professional CD recorder to burn our AAD UltraAnalog CD.