"Unless you are doing digital processing, and I don't think you are, there is no sound quality improvement available in software"
Audirvana Studio will significantly improve sound quality. It optimizes the server in multiple steps by minimizing non-audio functions, assigning dedicated RAM, and running output through a single port in exclusive mode. Many others.
Definite improvement in noise floor and SQ.
If you are into Tidal's MQA (I'm not), AS software will complete the first "unfold".
AS also lets you add your own custom or third party DSP convolutions to the signal path.
And BTW, remote software for tablet or mobile phone control.