Muffled vocals

Digital is still in second place for realism when compared to a good LP playback system! Check out Fremer's Analog Planet site! I am glad I held onto my analog gear and LP's when everybody was ditching theirs! "Perfect Sound Forever!" - NOT!

The venerable Altec Valencia's have a mid-range presence lacking in most contemporary (and touted!) speakers! They certainly can bring the performers right into your listening room!

Are you using the digital out of your cdp or the analog outs into the Lyngdorf? 

In my experience, all things equal, the CDPs in general don’t contribute as much to the soundstage - detail and resolution yes but not soundstage. Magnepans in general tend to exaggerate instrument and vocal/singer size and dimensions so they are a poor baseline/reference. Assuming your room correction is off, try pulling the speakers more into the room and see if that helps. Also, try live recordings like Stacy Kent, Madeleine Peyroux, etc., where the singer(s) tend to stand further out front on the stage and see how they sound. In my experience, what you’re describing is a characteristic of speaker, type of content, and/or room placement and not the quality of the source.

For vocal reproduction quality is 99% is speaker itself'
You can try to change wires , room correction , source ,
etc but this is waste of time