Jim Austin briefly discusses MQA in
his review of the Explorer
2 in this issue, but a more complete description of MQA can be found in an article posted on
Stereophile's website at the
end of 2014.
MQA involves two fundamental concepts, discussed in a paper presented to the Audio Engineering Society in October 2014, the first responsible for a potential improvement in sound quality, the second responsible for a large reduction in the bandwidth required for storage and streaming of high-resolution files...