Bindjim - here is some nice info on USB and the driver requirements in plain terms:
24/192 high rez via USB - Drivers, EMU0404, etc.
The biggest problem with USB right now is really the mediocre and after-though implementations of many current DACs that just add USB as a second interface without using the advantages of USB (the TAS review just reflected that). Some of the DACs that have a dedicated USB interface of course do have good implementations, except then you throw all eggs into one basket which is not always a good thing.
24/192 high rez via USB - Drivers, EMU0404, etc.
The biggest problem with USB right now is really the mediocre and after-though implementations of many current DACs that just add USB as a second interface without using the advantages of USB (the TAS review just reflected that). Some of the DACs that have a dedicated USB interface of course do have good implementations, except then you throw all eggs into one basket which is not always a good thing.