this post was submitted on 26 Mar 2024
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Poeple jerking off CDs here dont understand down sampling and the average quality of CDS. they think that just because it is digitally mastered that it therefore must be the master that is put on CDS, its not.
I can't hear anything above 20 kHz, and neither can most people. CD audio is passed through a 20 kHz lowpass filter. It is then sampled at 44 kHz. Due to the Nyquist Shannon Spamling Theorum, when sound is digitally sampled at just above twice the rate of the source audio, converting it back to analog perfectly reproduces the original waveform. And I do mean perfectly. The exact same waveform. (The extra 4 kHz is to prevent artifacts in frequencies very close to 20 kHz.)
Therefore CD audio is perfect unless you think you can hear above 20 kHz. (Spoiler: you can't) There are a few good YouTube videos on this topic, and the best ones are very mathy.
Is there something I'm missing? Do I need to educate myself some more?
You are correct, CDs can reproduce the human audio spectrum perfectly, IF AND ONLY IF certain rules are followed, and I think that's why earlier CDs sounded weird. For example: how good were low pass filters when digital sound first arrived?
I really don't care to comment anymore on your FUD.