“@crenca’s definition of hi-res is ridiculous”
If so, then the standard used before MQA by almost everyone is “ridiculous” (your word, not mine).
“There is no single standard for High-Resolution Audio, but the most commonly used specifications are 24 bit/96 kHz (3.2x more data transmitted than CD) and 24 bit/192 kHz (6.5x more data transmitted than CD).”
" Hi-Res (as in High-Resolution) represents the apex of digital audio. These files - obtained through lossless compression or uncompressed - deliver better sound quality than a CD. They are encoded in 24-Bit, at frequencies that can go up to 192 kHz"
" The Recording Industry Association of America (RIAA), in cooperation with the Consumer Electronics Association, DEG: The Digital Entertainment Group, and The Recording Academy Producers & Engineers Wing, formulated the following definition of high-resolution audio in 2014: “lossless audio capable of reproducing the full spectrum of sound from recordings which have been mastered from better than CD quality (48kHz/20-bit or higher) music sources which represent what the artists, producers and engineers originally intended.”
It would be trivial to pile up citations such as these. Also, your example is not “lossy” as this term is used. MQA however explicitly (they admit this) uses a lossy algorithm to compress and then “fold” the 48 > 86 spectrum (everything after this is pure upsampling by the MQA DAC). Compression is not the mere transform of bit depth. Example: a 4 bit, 8kHz sampled file is not lossy - it is a full representation of the waveform within its Nyquist bandwidth (i.e, 4kHz) albeit at a very shallow db range.
This stuff is technical folks, so perhaps before we start to describe how almost everyone but MQA and it’s supporters apply terms such as lossy as “ridiculous”, we probably first try to understand what they actually mean…