Sampling at a slightly higher rate than Nyquist also eliminates band limiting of high audible frequency components, without taking more samples than absolutely necessary.

The CDDA format also has 16 bits of dynamic range, which allows for FAR smaller steps in dynamic level than the human ear can perceive, with a noise floor so low it may as well be dead silence.

The CDDA format is optimized to pack perceptibly lossless audio into as little digital data as necessary.

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