Running a Wiim Pro that I bought on Prime day. Set up is Wiim Pro>Topping DX3 Pro+>analog out to Yamaha receiver. I'm using SPDIF/coax as the output from the Wiim to the Topping. I have not been able to get anything better than 16/44.1 indicated on the Topping since using the Wiim as the digital source. The DX3 is not the issue. Prior to purchasing the Wiim, I used an Apple Lightning to USB camera adapter as the input for the DX3. When using the adapter (via USB input port on the Topping), it displays all the HD and HiRes rates. I did go through and checked to make sure that I had set the Wiim coax input to its highest usable setting with the DX3. No good. As an FYI, this is all on Apple AirPlay2. Any thoughts? I have run out of things to try!