Cпросил wyred4sound о более предпочтительном использовании их дака: о юсб с ПС и кернеллстриминг, или же по І2S с другим источником хайреза.

Вот ответ:
Yes, I would prefer PC to USB in Kernell streaming mode.

You can use the I2S via HDMI, but is not in the standard form. We will be offering modifications to other units to properly send the balanced I2S through the HDMI cable. Yes, Master clock can be sent through the cable, but will have to be mentioned to be configured at the time of order.
Please let me know if there is anything else I can help with.

Thank you,