I know that's what John's post says, but Ian @ Martin's HiFi was referring to playing DSD files... not DXD files... and there is a significant difference between the two.
Maybe the version of Sooloos being used by Martin's Hifi is an intermediary version on the way to the "full" capabilities outlined by John's post.
But as I said, I can't help but wonder what Meridian are thinking of by having this DSD capability and then not informing anyone about it??... just makes no sense.
Perhaps Ian can enlighten us with more information on the specific version of Sooloos in question... along with the firmware version in use on the ID41 within the 818??