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On 07/02/09 15:48, Brenda Ann wrote:
2) There is NO mp3 player that can as accurately reproduce a complex audio waveform as well as a high end cassette machine. I don't care how many samples you take of a complex waveform with an ADC/DAC system, the resultant playback waveform will never represent the original analog waveform as well as a high end analog device. Even a simple 1000 Hz sine wave will not come out as a pure sine wave after digital conversion, it will be a series of stepped square waves. You may not be able to tell the difference with your ear, as long as there are enough of those little steps, but that's not the point. The point is, it will not "run circles around" a high end analog device. If you take a look at a 1khz square wave after digital conversion, you'll see ringing at both ends of the flat top. You'll see that same ringing wherever there is a hard rise or fall. Is it audible? Oh yeah. More so on a naked square wave. Less so in complex music. But you can hear it. You'll see this wherever there is hard digital filtering, such as anti-aliasing on CD players. You'll see it where there is copious amount of data loss, as in MP3. An MP3, at it's best is a 4:1 data loss. The songs on iTunes and elsewhere are mostly 10:1 data loss. Sometimes more, sometimes less. Noise may be reduced, but it's hardly high fidelity audio. And though cassettes have their many flaws, a properly set up Nak will have more noise, but far less digital artifacting and zero data loss than any MP3. |
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