I dont know how you are supposed to hear about things like this anymore but I found this by accident and ordered immediately. Never owned a Doobie Brothers album in my 62 years but they were part of the soundtrack of my younger life. QUAD surround sound Blu-rays. I have the Chicago Quadio box from about a year ago. Very cool and I kinda feel about Chicago like I do about the Doobies but damn its QUAD surround on Blu-ray and the Chicago is AWESOME! There was a single disc Quadio Aretha Franklin Greatest Hits blu-ray but it's already out of print.