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09.01.2008 at 06:05PM PDT, ID: 23694728
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7.0

Calculating amplitude modulation of two frequencies in Java

Asked by glefman in Audio Editing, Java Programming Language, Signal Processing

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I am writing an international call progress tone generator and have successfully implemented methods for generation of up to three juxtaposed frequencies as part of the tool's function. However I am struggling to implement amplitude modulation of two frequencies. I have seen multiple mathematical notations, may of which follow one algorithm or another but since I am useless at mathematics I am unable to translate this into code.

I would be most honoured if someone with knowledge of amplitude modulation and/or someone who can interpret the algorithm into Java. For the sake of examples I wish to experiment with the USA Ringing Tone of 420Hz * 40Hz with 420Hz being the carrier signal, 40Hz as the carrier signal, 2000ms sample time, a sample rate of 16000 and 16-bit.

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[+][-]09.01.2008 at 06:15PM PDT, ID: 22363614

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[+][-]09.01.2008 at 06:43PM PDT, ID: 22363688

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[+][-]09.02.2008 at 01:55AM PDT, ID: 22365267

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[+][-]09.02.2008 at 06:23AM PDT, ID: 22367007

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[+][-]09.03.2008 at 08:29AM PDT, ID: 22378314

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About this solution

Zones: Audio Editing, Java Programming Language, Signal Processing
Tags: Java
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Solution Provided By: glefman
Participating Experts: 2
Solution Grade: A
 
 
[+][-]09.03.2008 at 08:47AM PDT, ID: 22378539

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