Thats a shame. Because Windows XP does not support Wassapi, and ASIO4ALL transforms ASIO to Kernel (or something like that,if I understand correctly). So I will have to configure JRIVER 17 to Kernel and maybe the Rega DAC will support it.But I am not shure it will have the same sound quality as ASIO. Just looking for bit-perfect audio, optimize the hardware and enjoy music.
Maybe this is a good reason to change the OS to windows 7 which supports Wassapi.
Thank for your swift answer.