.
There are five demonstrations here.
One of the ways to reduce the size of an audio file is the reduce
the number of bits used by each sample.
This first demo lets you
see and
hear the effect of
quantizing a sinusoid to various number of bits.
The
black is a plot of the original
sinusoid. The
red is it quantized.
Initially it's quantized to 8 levels. The
blue
plot below is the error signal. The error is found by subtracting the
original signal from the quantized signal.
Try this:
- Click the Play Sound button to hear the original signal
followed by the quantized signal followed by the error signal.
- Try changing the number of quantization levels. At what point is
the quantization noise no longer audible?
- When you are finished experimenting with this demo, scroll down
to the next.
Sorry, but the .Linux platform is not supported at this time.
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Quantizing a sinusoid
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