"Arny Krueger" wrote in message
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"ScottW" wrote in message
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"Erik Squires" wrote in
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ervers.com...

So, here's my question. If I digitize a 15 kHz signal, using a
44.1 kHz sampling rate, I'm going to get about 3 samples / cycle.

Are the normal digital filters good enough to reproduce a 15 kHz
singal with varying amplitude?

Deconstruct this signal to frequency domain and it won't be a pure
15 kHz.

Wrong.

What is the frequency of the amplitude "variation"?

Obviously, 15 KHz.

Show me the fourier series which contains only 15 kHz components
which results in a 15Khz waveform with "varying amplitude".

ScottW