Thanks for that, Paul.
I bought the QNAP some years ago as a business server, although I did briefly use it for music. Some of the first music servers used modified versions of Windows Media Server - a truly horrible application. The Naim server software (now replaced) was built by a couple of freelance techies and had a fatal SQL flaw. QNAP software is spectacularly complex, it does millions of things for systems from one standalone unit to thousands linked around the world. It has been developed by hundreds of engineers for millions of users over 20 years.
Many people use QNAP and Synology units as music servers, although with SSD rather than SATA drives. (My business unit has standard WD Red SATA.) There is discussion online about using galvanic isolators in the usb path, but the device I use (SSD inside an Aries Mini running Lightning Server) streams wirelessly. The Aries server runs off an external linear power supply fed from a PSA regenerator.
For computer sources, a very popular device over here, made in Germany, is the Mutec MC-3+ Smart Clock USB. There are a lot of cheap inline devices that many seem to think are generally useless.
Melco ran a “Streaming Masterclass” at my audio dealer last week. Maybe I should have gone.
I appreciate that computers introduce a whole range of issues with electrical noise at audio frequencies, which is why I’ve kept non-audio computers and electronics out of my system.