CDs can, by a very narrow margin, reproduce sounds beyond which the human ear can detect. There’s a theorem that states you can perfectly reproduce a waveform by sampling if the bitrate is double the maximum frequency or something like that, and CDs use a bitrate such that it can produce just above the human hearing range. You can’t record an ultrasonic dog whistle on a CD, it won’t work.
It’s functionally impossible to improve on “red book” CD Digital Audio quality because it can perfectly replicate any waveform that has been band-passed filtered to 20,000 Hz or thereabouts. Maybe you can talk about dynamic range or multi-channel (CDs are exactly stereo. No mono, no 5.1 surround…Stereo.) It’s why there really hasn’t been a new disc format; no one needs one. It was as good as the human ear can do in the early 80’s and still is.
xthexder@l.sw0.com 1 day ago
Vinyl is lossy in that any dust or scratches on the record can be heard in the output, so this only true if you’ve got an absolutely pristine vinyl.