38 karma · joined March 18, 2023
With dithering, the only difference a smaller bit depth makes is a higher noise floor, with the noise being just background white noise (like tape hiss). With most pop music a 10 bit depth with dithering would likely not be audibly worse, since pop music is usually compressed into like the top 10dB of the dynamic range.
I doubt it, since CD-quality audio is already objectively better (for human hearing) than analog audio on LPs. The only thing LPs are better at, sound quality wise, is extension into the ultrasonic range of 20-30+ kHz (which we can't hear anyway) but the SNR and distortion metrics are much worse in the ultrasonic band than the audible range.
I'm not sure if this is a named principle, but it seems intuitively obvious to me that on any particular encoding medium (magnetic tape, vinyl groove, etc.), you can encode "more" data in an analog way than digital, since with digital encoding you need to be able to make distinct symbols onto the medium, and represent any signal fluctuation with a series of such symbols; whereas with analog encoding a tiny fluctuation in what's recorded to the medium can correspond to a tiny fluctuation in the signal. Of course the tradeoff is that digital data is much more immune to distortion from imperfections in the medium.
If the same track width and pit sizes on CDs were used to encode audio in an analog way like LaserDisc does video (the continuous distance between pits being modulated by the signal), no doubt it could encode well into the ultrasonic range and surround audio channels via modulating them into different frequency bands. But it would have its own characteristic "surface noise" and "pops and clicks" just like vinyl.
The frequency range of human hearing does cover all the way to 20 kHz, and maybe a tiny bit beyond especially for kids and teenagers. That says 40kHz minimum sampling rate, 44.1 is enough to cover the full range, give a tiny bit for the antialiasing filter rolloff band, and the exact number was chosen IIRC because it fit well into repurposing existing 80s video recorders for digital audio.
The dynamic range of human hearing from threshold of audibility to threshold of pain is slightly wider than the theoretical 96 dB of 16-bit audio, but with dithering the effective dynamic range can be > 105 dB. Of course most popular music only uses a tiny bit of that range, but movies and even classical full-orchestral music can use 60 dB and beyond, for which 10 bits wouldn't be adequate.