T+A has done a lot of testing with native DSD512 from Linux sources with the latest versions of the Amanero USB firmware. We can confirm @volpone 's frindings that the streaming from Linux is very stable and meanwhile works without issues.
There were however some problems with new Windows drivers required for the new Amanero firmware. As soon as these problems are solved we will use the new Amanero firmware for the DAC8DSD. Currently I can not say when this will be the case (hopefully before trhe end of this year - but I can not promise this).
As soon as the firmware is officially released, we will give some information about upgrading products already in the market.
For the time beeing there is the possibility to switch to the Amanero beta firmware which works well for Linux (like @volpone did). For Windows based sources, please stay with the current firmware.