OK,I tried 3538C and the 3538G update.There's no improvement.24/96 recording and the UDA codec are still not working. I think I was using Win98SE or WinXP SP1 before when the UDA codec worked. I know it worked before.I was recording with the UDA codec at 16/48 and there was a difference when toggling between AC97 and UDA.I also got 24/96 working with the old Sound Forge 6 via MME. If someone with a SB0240 (or SB0240P) card is willing to test these old versions on Win98SE or WinXP SP1,I can upload them together with the old version of ProFX 2.0. This is a very serious bug that must be fixed before the final 3539 release.