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Devialet and MQA
#61
The first unfold does actually retrieve additional data that is "hidden" in the lower 8 bits of a 24 bit MQA file.

The second "unfold" is upsampling and imposition of one of MQA's minimum phase filters. (so not really an "unfold" at all, consider that most DACs, including Devialet, upsample inputs anyway)

The third unfold is something written in MQA marketing documents, but other than that there is no evidence it exists. Maybe it just refers to the MQA filter, which does not make sense. All very confusing.

Regarding the Bluesound Node, I believe it can digitally output decoded MQA after having performed the "First Unfold". Any upsampling or imposition of the MQA filter (second and mysterious third unfold) is performed by the Bluesound's internal DAC.
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#62
(28-Apr-2021, 10:16)Confused Wrote: The first unfold does actually retrieve additional data that is "hidden" in the lower 8 bits of a 24 bit MQA file.

This is how I've understood MQA too and how Bob Stuart described it in the beginning.
When I downloaded (from Tidal) my first (and last) MQA album, "Fairytales" by Radka Toneff, it turned out to be a 16bit 44.1kHz "MQA CD", not the 24/48 version John Atkinson wrote about in Stereophile. Was it as good as the 24/48 version? I doubt it, but I never found out. I ended up buying the SACD and ripped the DSD layer in stead.
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#63
(25-Apr-2021, 19:47)markush Wrote:
(25-Apr-2021, 14:25)BoyScout Wrote: Are you sure about it?
I´m thinking about that same move.

Definitely! The difference is really huge. Not just on high-res material but also on standard CD Formats.

Humm... not available in my country, yet. Sad
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