I had a dilemma with playing iTunes or JRiver, rips and other music files downloads with an equality of sound on my Antelope Zodiac Platinum Dac. The timing crystal is completely environmentally isolated so the timing is stable all the time (I leave mine on all the time). I wanted to convert these to the same bit depth and sample rate and in .wav format (storage is so cheap now). I use Aul ConvertR 48x44 PROduce-RD software to do all my conversions to my NAS which is my ROON server. I can play from NAS, stream from Node or Naim, play via Ethernet (for reliability) and Airplay through my Yamaha amp, (soon to by upgraded bigtime). I can listen to internet radio (preselected or me typing my favourite radio's ulr). My sound is uniform, until I play MQA and then the clarity is much improved. The thing is uniformity. You cant get a 16/44 CD quality file to be HD. What the Aul ConvertR software does is give you a means to input any format to (any) format you choose and change the bit depth and sample rate along the wany. It makes a big difference. The developer has also worked with JCat audio components for PCs. I used their gear to output quality sound via usb to the DAC and out via HD800 h/phones. I now convert all files from PC to NAS and play via Roon. Best sound ever, even if my system is not worth $10k all up. (This will all change when my new house, with a dedicated media room is built. I have project system worth well over $100k going in and the sound will be sublime... sorry for long blog, but its a big subject.
Adrian