I just got my USBPre 2 today. Cute little thing! I connected it to my XP Laptop and it used the Windows USB Plug & Play drivers. There are no drivers that come with the unit. That's strange. As I recall the standard Windows Plug and Play USB drivers are limited to 24 bit 48k sampling rate. And the drivers do not deliver Bit for Bit output. I have some 24/96 files and some 24/176 files that I play with Media Monkey through a ASIO driver, a RME sound card to a Benchmark DAC 1 using a AES/EBU connection. Fantastic sound. When I play them on the USBPre 2 the files are downsampled! I called Nic at Sound Devices and he confirmed that using a PC with XP, Vista and Win 7 that the standard USB driver will limit the RECORDING and PLAYBACK of the USBPre 2 to a maximum of 24 bit, 48k sample rate using the crap Windows Audio Control Panel! SD does not have any special ASIO drivers. I do not know anything about a MAC computer, this information is for a PC. Not being able to record and play files up to the advertised 24/192 on a PC is a big deal breaker for me and I am returning this unit. SD needs to put this information on their website and let their dealers know. I am not happy! I hope that there is an explanation and answer for this limitation.
Update: I just received a call from Bob Mondok from Sweetwater regarding the above problem.
He talked to an engineer at SD and was told that a ASIO driver is needed for High-Rez recording and playback.
Bob stated that SD may have a ASIO solution next week. So stay tuned....
FYI. Bob stated that the MAC can do High-Rez as is, no driver needed.