To me all of these are a waste of time for one simple reason. We are consumers. If a record company chooses to make a recording in only DSD and we want a hi-rez version that is our only choice as is the reverse situation. We also don't control the content they choose to put on hi-rez or how it was originally recorded (or what chain of things it goes through) - analog, DSD, PCM. We are on a forum like this to get information about hi-rez material and releases. Also, if you are dealing with a paricular brand of equipment (as noted by Ted), it may not do all formats equally.