Mytek have just updated their firewire driver July 2013. There is also a beta firmware update from last month. I tried to install the beta firmware update last month onto my windows 8 32bit OS but recieved a message to say not compatible with my system. On looking into the firmware folder all the files seemed to be relevant to 64bit systems not 32bit, so I contacted Mytek about this and their message was that this should still be suitable for my 32bit system. I finally managed to install the new beta firmware by uninstalling the mytek dac in the Control Panel > Drivers and then reinstalling the device with the new file after a restart, all operating well including usb2 and firewire Native DSD playback, well worth trying the new drivers.