More outstanding advice, thank you Mikey. I now have my first DSF files! Once new users follow the instructions and have the appropriate equipment, it's all beautifully easy.Outstanding!
The extraction to DSF from that ISO is easy, just insert the flash drive into your computer. Then click the radio button in the GUI's Input field setting for File, and use the Browse button in that same field to find and select your ISO.
Then move down to make your extraction settings, i.e. stereo only, stereo + multichannel etc... and designate where you like the DSF track files to be written in the Output directory field. You can even choose separate locations for the stereo and multichannel.
Then hit Run and the extraction will begin.
As I am totally new to the world of DSF, and as a Plex user for my music playback (mainly), I don't really know how to proceed. I will search the site, but is that sort of thing dealt with on Hi-fi Haven, or should I look elsewhere?