Quote:
Originally Posted by bezusheist
Nyquist for CD audio (44.1 kHz) is 22,050 Hz.
the "limitation" to anything less would be at the ADC or DAC.
so yes, 21 kHz can be recorded and produced to/from CD.
It is capable of 0 Hz to 22.05 kHz. Hence the term "lossless".
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Lossless does not refer to frequency response, as implied here. It means compression without information loss. In other words the data is simply stored more efficiently. ALL of the original data is still there.
Lossy compression like MP3 (depending on level of compression) uses psychoacoustic models to get rid of supposedly inaudible sounds that are masked by other sounds.
The greater the compression the more aggressive this psychoacoustic model has to be. Lowest bitrate compression is quite audible to everyone, not only wiping out detail but introducing strange artifacts.