Linux does not do native DSD, unless the Linux kernel on the specific devices is patched for the specific DAC. That is why it is defaulting to DoP with the USB Bridge. You should contact Allo and ask if they have patched the USB Bridge to work with the Quad Vena II.
Well, my suggestion is to first use what you have and decide if you like DSD 256. See if the manufacturer provides drivers for Windows. If so, then download the drivers, load them on the Windows core, attach the DAC to the Windows Core via USB and then give native DSD 256 a try.
Not the device I’m using.but…
Upscaling everything to DSD512…Except MQA over Ethernet from ROON ROCK > ASUS AC87 Router > Allo Signature > Project DAC…Without any interuptions at all…Just playing as it should
Native DSD playback is also possible with that setup…up to DSD512