Parasites à 192khz avec un DAC Denon DNP 730

it’s fine when i read the file on the NAS with the DAC without Audirvana and streaming

Can you connect the streamer directly to the computer and test it that way? Try also to also the file on the streamer from the USB stick.

it works when i connect the computer directly on the Core device (bang & Olufsen) and without the DAC Denon.

is Audirvana like a software DAC ?