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mrobyesterday at 10:55 PM0 repliesview on HN

Anybody can distinguish 60fps from higher frame rate just by looking at steady motion. The famous Blur Busters Test UFO makes it easy:

https://testufo.com/

But in the case of analog recording, nobody can distinguish a pure analog recording from the same thing but with a good ADC/DAC pair in the signal path in a blind test. It's theoretically possible to hear undithered 16 bit quantization noise if you turn the volume up extremely loud, but correctly mastered CDs should be dithered from higher bit depth.

And 44.1kHz sampling rate can theoretically represent arbitrary waveforms up to 22050Hz. The only complication is that this requires a brickwall filter, which is impossible to implement. That's why the sampling rate is set higher than needed to exceed the 20kHz limit of human hearing (in practice the limit for adult hearing is almost always lower). The higher sample rate allows for a practical filter with a shallower transition band to be used.