The MQA firmware Release notes are now listed.

818 Product Firmware 4.00 (2016-01-22)

New Features
DSP. Added MQA decoder and renderer (818v3).

Software Fixes - Useful - May be useful to upgrade but not essential
USB. Fixes occasional connection failure at power-up.
Comms. Fixed displays for Meridian 504 Tuner.

Antipodes CX + Roon, 818v3, DSP 7200SEs, 218, DSP3200s