Music and Computers
Make a Noisy Copy
When you make a copy of an audio cassette tape or a VHS tape, the copy
has more noise than the original. If you make a copy of the copy then you
will get even more noise. Noise can be thought of as a random modification
of the original. This principle is illustrated in this Applet which makes
a copy of a melody. Since we are working in the digital domain we could
make a perfect copy each time. But instead, when we make a copy of the
melody we will alter it randomly in a subtle way.
To Do:
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Click on the drawing of the melody to hear it. It is the box with the dots.
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Make a copy by hitting the "Make a Noisy Copy" button. It may be exactly
the same or slightly different.
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Play the copy by clicking on it.
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Keep making copies and notice how they get further and further from the
original.
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Hit "Reset" and try it again with a new song.