Thankfully, after some much appreciated help from a fellow ‘Hiker, I’ve now accessed the Legacy program and the 568.2 MM is now setup and functioning.
I’d forgotten what a great piece of kit the 568.2 MM is.
Congrats!
I completely agree with you, the 568.2mm is still held high in my book as well. Still have mine in storage. Good condition ones still go for decent money.
Always loved the 500 series ergonomics and form factor as well and that exclusive all digital DVD-A signal path back in the day allowed MHR to be repurposed for lossless HDMI audio + source control all these years later which made M look like geniuses.
The last 568.2mm firmware added the "Smart Source" preset architecture of the G-series and 861. So it functions like any late model M processor would despite being 21+ years old but in a 500 form factor. Truly amazing, really.
Out of the former Meridian pre-pro product line, both in value and SQ, the 568.2mm is arguably the best kept secret. Add a 621 or 722 and the sound quality of the MHR link beats out many 10yr newer 4/5 figure 7.2ch processors with a direct HDMI bitstream hook up in clarity and dynamics. And it's not just the source PCM decode and HDMI audio de-embed, but rather what Meridian does with the signal in the processor that makes the difference. The filter and upsampler of MHR is the real deal. I suppose Chord's m-scaler for 2ch is similar. The clarity, channel separation and noise floor was better than everyone else until Trinnov showed up and even then, I'd only recommend a Trinnov, Datasat or Theta unit for Atmos setups otherwise for channel based surround, Meridian all day. Processors designed with custom modular card based designs, whether visible externally or inside always tended to sound best in my experience. Commercial theater processors have used the same card based architecture since the 70s.
I like to think of the 568.2mm as a mini-fied, early 2K DCP PCM 5.1 era (circa 2008/2009) quality theater processor in your house that also plays music equally as good as it does legacy 35mm format SR/AC-3/DTS and Mono encoded program material. Much of the channel processing and mapping functions use logic like that of a theater processor. I've only seen Lexicon and Datasat offer similar channel remapping logic for the consumer market. It's nice not having to engage an aggressive upmixer just to get decorrelated (not just summed and attenuated) back surround fill playing 5.1 material. 95% of consumer processors (even "high end") leave these channels silent or force an active upmixer which is often badly implemented and adds unwanted artifacts and other imaging negatives.
Enjoy your 568. Sorry for rambling but I loved mine and hope you enjoy yours in good health