Frank, Thank you for asking! As Danijel mentioned USB Audio 2.0 support is important for higher sample rate / higher bit-depth / higher channel count hardware. If the hardware does 24-bit 192kHz then USB Audio 1.0 cannot even do 2 channels. Even with the more widely used 24-bit 96kHz, then channel count is limited to stereo. If someone wants to just use 24-bit 96kHz for 5.1 playback, this simply isn't possible with USB Audio 1.0. Now that there are more USB Audio 2.0 solutions coming to market, each company is having to develop it's own driver... and of course each will have varying degrees of success. Audio driver development is generally not the core competence for a chip-set company so they end up having a 3rd party company develop the driver. OEMs end up with the "not our fault" situation where the chip-set company blames the driver company and the driver company isn't being paid to fix bugs. The end result is products that don't work very well on Windows but work better on OS X. As it is now, all of the USB Audio 2.0 solutions are having to be qualified on OS X 10.6 (which does support USB Audio 2.0). I think the key issue is market acceptance. Microsoft never supported audio on FireWire in the OS, and I would say there are fewer FireWire audio devices on the market as a result. If Microsoft supports USB Audio 2.0 in Windows 7 SP1, I think you will see many USB Audio 2.0 devices hit the market. Thank you, David A. Hoatson Lynx Studio Technology, Inc. www.lynxstudio.com <http://www.lynxstudio.com/> _____ From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Frank Yerrace Sent: Tuesday, October 20, 2009 6:24 PM To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Why would you want USB Audio 2.0 in Windows? There are occasional questions on this list about USB Audio 2.0 support in Windows. We (the Windows sound team) are curious to hear specific reasons- scenarios, business, features, etc.- that would be enabled if USB Audio 2.0 support was included in Windows. Are any of you willing to share this? The more specific you can be, the better. If you do not want to share with the entire list then feel free to send a message to me directly. Frank Yerrace Microsoft This posting is provided "AS IS" with no warranties, and confers no rights.