Digital captures a numeric value for a sound wave at a specific moment in time. This is called a "sample." As soon as that moment is gone, though, the numeric value for that sample has no further use. You have to read a new sample for the next moment, and another sample for the next moment, and so on. Instead of being a complete record of the sound, samples are a series of dots along the sound wave. The number of samples each second is called the "sampling rate." A high sampling rate produces better quality sound, but it also produces a large file. "CD quality" uses stereo sampling (two separate audio values) at 44,100 samples per second. In rough figures, this will require 10 megabytes of disk storage for every minute of music. To low a sample frequency and the sound gets distorted like the old movie sample rate which had the wagon wheels going backwards due to the frames per second rate at which they were capturing the action. That sample rate was producing what is known as aliasing or an alias of what was truly happening.
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Today's Featured Article - Product Review: Black Tire Paint - by Staff. I have been fortunate in that two of my tractors have had rear tires that were in great shape when I bought the tractor. My model "H" even had the old style fronts with plenty of tread. My "L" fronts were mismatched Sears Guardsman snow tires, which I promptly tossed. Well, although these tires were in good shape as far as tread was concerned, they looked real sad. All were flat, but new tubes fixed that. In addition to years and years of scuffing and fading, they had paint splattered on
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