It was replaced by something just called "Dolby", which does basically the same thing. What's MUCH worse on, all current 4K receivers, is that they will no longer decode quad. If a 4.0 MC signal is input, ALL current receivers, EVERY brand, will just give you the front L & R channels, ignoring the 2 rears, displaying the incoming signal as 2.0, rather than 4.0, necessitating using the 5.1 inputs, thus losing bass management. I have spoken to a few companies, & it seems to be a bad implementation of the current decoding chip that EVERY manufacturer uses. ALL quad DVD-A transfers will not play properly, nor will the Pink Floyd DSOTM & WYWH Blu-ray quad mixes play. DTS & DSD work properly, just things that display as "4.0 Multichannel" will not work. All 5.1 stuff works properly. I am right now holding off on getting a new receiver (the HDMI video out died on my Integra 50.3), as I am hoping SOME manufacturer could fix this with a firmware update (if this is even possible). This is probably why some recent quad releases (like the Jethro Tulls) show 5.1 or 5.0 with blank center or SW channels, to fool these decoders into working properly. This is a disaster for QQ. I at least request that Bob R, AOQ & Fredblue encode blank channels from now on, otherwise anybody with a new receiver won't be able to play them.