Raspberry Pi serving USB DAC - how to stream Audirvana and Roon

[Browniesbane]

So, I followed up on these suggestions and was able to use  a raspberry pi  running diet pi as an endpoint for audirvana. Only problem is SQ is just unpleasant. Tinny, more  background noise than I'm used to and  maybe a little bit of distortion.

 

Any suggestions? I have music files on a remote drive, Audivana is on an iMac on the network, the raspberry pi is connected by wireless and feeds usb into a gen5 bimby to a valhalla 2 to HD650s. 

 

Is it likely that the Bimby isn't cleaning up noisy usb? I though gen 5 were supposed to solve that problem and that I wouldn't need a hifiberrydigi.

 

Ive also heard complaints about running the raspberry pi on wireless. There is no direct ethernet connection to the network close by, but  Im wondering if using an apple express in client mode connected by ethernet to raspberry pi might help. (Thats how I connected a micro rendu before I moved it to another system.)