>> ...If I am not mistaken, the Ultra Analog AD design was not all discrete. It was based on a 2 chip design by Bob Adams (now in Analog Devices). He is one heck of an engineer! He is the one that introduced sigma delta to audio... <<
Dan, thank you for the clarification and history. This forum has carried the most comprehensive discussion on the constraints and solutions in digital audio which I have yet read. I worked on high end analog gear for some years, and appreciate the use of electrical ("analog") descriptions of difficult A/D and D/A challenges. Regards, Sam