I don't like the DTS:X Upmixer at all for 2CH music or non-discrete surround sound. I don't know what DTS did but the old Neural:X was far superior IMO. Stick with the Dolby Upmixer as they clearly have the better upmixer in this generation of "immersive surround sound".\nGene. Hello. I didn't know I had dts Virtual X on my Marnatz. I need to go to SpecSavers :D \n\nI taken a same listening again with centre channel only all other channels MUTED! This is how I can compare cross-talk with Dolby DSU, dts Neural X and dts Virtual X.\n\nPlaying scene from Star Trek if you happen to own the Dolby matrix version with original mix not that bluray version. Then take the listening time to MUTE all channels in your room except for the centre channel and take a listen at what the upmixers are doing. \n \nDSU seems to use a sound frequency canceling technique but reduces bass level slightly and I use no bass management on the AVR its all full-range. \n\ndts Neural X I can still hear the cross-talk at very low level but the bass level is more steered towards centre with an mild equal level on LR. \n \ndts Virtual X seems to raise some of the cross-talk at certain sound frequency the bass level seems to be the same unless I compare it visually on TrueRTA to see what is happening?\n\nI was kinder thinking I need to buy another AVR that had dts Virtual X. I only had the AVR for few months. \n\nOkay now when I switch the height channels Height 1 Height 2 ON and even thou they are MUTED I can hear what is happening with the centre channel it seems to have sucked the bass dry like some sort of "HeightVampire" Okay let me now MUTE centre and listen again to same repeated scene in Star Trek 1, Enterprise lighting up before leaving space dock as it has a cool, Jerry Goldsmith score. \n\nNo I don't want that centre spread ON sounds dreadful with films that have visual reference images. \n\nOh bloody hell! This AVR gets confusing I think its the one that needs to be anti-depressant tablets. Okay I switched the Height 1, 2 back on but when going into the sound menu on Marantz SR6012 the Virtual X has been detracted only something called Virtual is on the screen along with DSU, Neural X and Virtual. \n\nOkay what does Virtual for Star Trek. Rubbish! Its only two channel. \n\nYou know what? Maybe I should post this in "the hate anything goes" forum :D I hate the format switching on the Marnatz why can't all these channels and assign them be packaged with more channel OUTPUTS so when switching to have the speaker like this or like that it needs only be format switched in few seconds! The consumer has to go into the speaker menu and shuffle settings around SIGH that is my biggest pet hate with my AVR. \n\nNeeds more channel outputs and proper format switching on the remote control with a visual on screen that shows the speaker configuration without having to fondling around with remote settings for about I would say 50 seconds or less? I like to do speaker format switching in just 2 seconds. the time I have to move my arm over to the AVR and press the format setting. \n\nOh as for the bluray of Star Trek 1, I don't hate it I just prefer if it had the original 1979 mix as it does exist on 70mm that only had a premiere screening but making 70mm prints at the time, was short for theatrical release so they did 35mm release prints. \n \nOkay load the bluray in the Panasonic while original still plays in the Sony. The bluray version has a missing single one second sound effect and that echo effect of Mr. Scott speaking over the com to the bridge on right channel that it was the warp engines ain't balanced and that is enough to throw it into the kitty litter box. Sounds like he's speaking on a Tandy microphone echo box. Where is the echo on the bridge? No one else's voice echoes on the bridge and not even in engineering its a delay issue on the remix where someone has applied far, far too long delay time.