I have a hackintosh running OS X 10.5.2 and E-MU 1212m with kx driver 1.3b0. The sound output seems to work well, only it is too slow - the speed of playback is much slower than it should be. Maybe it is a 44100/48000 issue, and I have misconfigured something? The driver only supports 48000 output, and most sound sources in the OS (such as QuickTime or Flash audio in browsers) output 44100. This could probably be the reason. Maybe some sample-rate conversion has to be applied somewhere?