I’ve come to think of MQA as two completely different faces in one container. This appears to be fully misunderstood by many.
On one hand MQA is a time coherence correction tool that makes quantum leaps in restoring the ambient synchronization of frequency and location arrival of sound to the listener. It does this with both analog recording ADC and playback DAC knowledge applied to remove pre- and post-ringing echoes that typically create huge miscues to the listener’s ear on what was played when, and from where in the room on the recording. These miscues are cause for endless fatiguing analysis and corrections done by the human ear which is monumentally sensitive to timing and location, much more so than to pitch (frequency) itself.
The other face (unrelated entirely) of MQA is its ingenious methods of folding hi-res recordings (up to 24/384kHz) to nothing greater than 24/48kHz in any lossless PCM format including the popular file compressed formats of FLAC (PC) and ALAC (Mac). This allows the full spectrum of sound and air/harmonics to be restored on playback by MQA enabled DACs using little more than, or even less than 1mbps bandwidth on transport and delivery to the DAC.
Folding is 100% lossless with regard to the noise floor in the recording. No ambiguities there whatsoever. The fast (compressed) delivery of the data reduces the time and space required to allow quick and easy transport over Internet for downloads or streaming as well as on standard CD capacity disks. This is almost 20x smaller than the data/bandwidth footprint of a WAV or AIF hi-res PCM download at 24/384k and the popular DXD (24/352.8k). The latter monstrous file sizes prohibit downloads for almost everyone and streaming is not possible at all. MQA solves this problem with 100% bit perfect accuracy in a package almost 20 times smaller on delivery.
So MQA’s two-faced solution restores an edgeless natural enjoyable ambient sound to PCM masters at any resolution by removing brickwall filter imposed edges as time smearing. And MQA delivers in a package (PCM format) that fully accommodates all known media requirements for users including (I hope!) future wireless lossless full resolution transmissions.
All this is done with full portability by the user to any and all media devices for playback including non-MQA equipment. CD ripping and format conversions (e.g., between FLAC, ALAC, WAV, AIF) can be done by anyone at anytime with the full preservation of the MQA encoding. Royalties are paid by the sources (record labels, MQA compatible equipment mfgs, streaming services) not unlike CD, Dolby, DTS, and many other popular digital audio technologies used by the recording and film industries for many decades.
What’s not to like?
– DE, http://davidelias-mqa.com