equency. One drawback of this system is that when the needle moves over the grooves created during recording, it alters them slightly so that with repeated play the phonograph wears out over time.
CDs were creates for recording, storing, and playing back music with two goals in mind. The first included the desire for high levels of fidelity, in other words the original signal and reproduced signal are very similar. The second goal encompasses the desire for perfect reproduction; in others words no matter how many times you play a CD it will always sound the same. To achieve these goals, the following technology is utilized, “Digital recording converts the analog wave into a stream of numbers and records the numbers instead of the wave. Conversion is done by a device called an analog-to-digital converter (ADC). To play back the music, the stream of numbers is converted back to an analog wave by a digital-to-analog converter (DAC). The analog wave produced by the DAC is amplified and fed to the speakers to produce the sound” (Brian 6). Since the numbers never change, the analog wave made by the DAC is always the same.
CDs are able to achieve such high fidelity levels because of the analog-to-digital conversion process. For instance, if you want to take a sound wave and sample it with an ADC there are two control
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