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 - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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