Thank Goodness that the ringing in the recordings isn't Trance Amulet M-VT Phantom related! The ringing or chiming is from the strings when playing fairly aggressively as I can hear it when playing acoustically without being plugged in. There may also be a sympathetic vibration somewhere in the guitar, and I'll check that to see if something is loose. Although they sound good, the strings are the original strings that Martin factory-installed over a year ago so maybe it's time to change them, ay?
P.S. My Martin D18, with the Trance or Schatten HFN installed, and judging from my recordings has (had) that same acoustic string-ring as the Martin HD-28. The current strings on the Martin D-18 are only a week old. So, it's a combination of my playing style, and maybe my Guitar Moose .88 mm Classic pick. I'll try my Charmed Life .035" inch thick Vespel and Blue Chip TD35 teardrop picks to hear if they lessen that string ring thing.