Hi Dan,

Indeed, it is amazing but the 5.30 version of Logic works perfectly with Windows 8! That said, as UltraChannel works fine on my other computer (XP SP3), I'll finish the audio mix on this one. What seems odd to me when the same is that it worked fine on Logic 5.30 in Windows 8 and this has bugged when I installed the update! But I'm not desperate to find why and how!
Again thank you for your help and if you find a solution, it will be very welcome!
best regards
Yves