Update, after some weeks... :x
Tried the USB 3.0 Asus PCIe expansion - NEC chipset - and loaded drivers with Multibeast.
No way. A USB data key works great, but different USB device plugged into the expander (i.e. Korg PadKontrol) is not recognized. I can see the device Tascam US 2400 plugged in System Profiler, but no way to see the tascam MIDI ports on Audio Midi configuration and /or any audio application.
What's more is: if plug anythnig into the new blue USB 3.0 ports, the current active Firewire audio interface is not recognized anymore and I have to switch the fiewire cable on a PCIe port expander with a TI chipset.
"PC" speaking it seems an IRQ problem. A conflict between interrupts or something like that.
I am back with a normal USB port like in the past. Tried everything with no success.
With Reason 6 the USB controller in Mackie Control mide works decently.
With ProTools 10 Native in HUI mode the behaviour is totally erratic unless I switch the latency to i.e. 512 samples from 1024 inside the Engine window.
In this case when I click Apply all faders suddenly go to the right position.
Don't know how to proceed any further.
Too much newbie on Hackintosh, too ignorant.
I have 2 Hack identical machines assembled by a great guy. And a Tascam US 2400 controller to connect for each system...
For information, on my old 2007 Macbook Pro, same Snow Leopard version, the same Tascam is working great if cnected on the left Usb port. Erratic behaviour if connected to the right USB port.
Any help truly appreciated, thanks in advance.
8) Teetoleevio