Srajan, in addition to accessibility for Amazon Music Unlimited, the recent Lumin firmware offered an under-the-radar filter: the cryptically named QRONO d2a, which sounds like a robot from a 1950s SciFi film. Developed by MQA Labs (now part of Lenbrook Media Group after its purchase of the assets of MQA Ltd.), QRONO d2a applies tailored filters and noise shaping during playback to allegedly reduce timing errors (time smear or ringing) in D/A conversion, leading to what Lenbrook says is clearer, more lifelike sound with improved microdynamics and stereo imaging. It works on any digital audio source, making even standard PCM files supposedly benefit from enhanced playback fidelity. As of Lumin Firmware 20 update, certain Lumin models including my X1, now offer optional QRONO d2a processing for playback via their analog outputs. I tried the filter and really couldn't tell a difference. The only other adoption of the filter which I am aware is via Lenbrook's Bluesound Node Icon. My guess is that in the interest of wider adoption, they offered it to Lumin. My guess is that the filter will be used almost exclusively in Lenbrook's roster of products but won't make the mainstream. Michael
I didn't know that. Thanks for filling me in. Srajan
