I just flashed the cable 2.0 firmware too and it looks like the file name for the firmware says "SONATA_HD-A-V2.0.exe" which I would guess is an updated version of the "A" firmware. This would make sense considering the device also shows up as an input. I'm also not able to go above 24/48 with this new firmware, but the volume works much better on windows now. Hopefully they release updated versions of the pure firmware with the same improvements. Edit: I also received a response from hidizs regarding the volume control and this is what it said; "Sorry that the SONATA don't have volume button at the moment,and need to adjust via computer or phone.considering this,we will update in next new product of S8.thanks." So it sounds like they're coming out with yet another dac/amp with buttons called the s8? I guess we'll see.