Amplitude Modulation

A 16 bit mono signal sampled at 44.1kHz was used to provide sufficient bandwidth for this demo.

Modulation
The signal was first band limited by a low pass filter with a cut-off of 4kHz then Amplitude Modulated by a 17kHz carrier frequency.

De-Modulation
The signal has been De-Modulated by a 17kHz frequency, but has not yet been low pass filtered.
Low pass filtering with a 4.5kHz cut-off will return the original band limited signal.

The tools available in Audio Suite let you play around with Modulation techniques so you can back up the theory with what happens in practise.

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Audio Suite