You can tell from the vertical size of the waveform how loud it is – its amplitude. ![]() Amplitude (“Volume”)Ībove is a pair of stereo recordings as shown in Audacity – the left and right tracks of a recent song from a CD, followed by the left and right tracks of the same song on a vinyl LP record. The visual representation of this is called a waveform. In practice, sound captured by a microphone (or our ears) will nearly always be a complex wave – lots of different sounds of differing volumes stacked upon one another. ![]() ![]() A raspy sound like a washing machine or a librarian going “shhhh” will be a very complex wave. A very pure sound like from a flute or a tuning fork will look like a pure sine wave.
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