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On now to additive synthesis. This seems like a strange departure from physical modeling but it is another synthesis form that, in theory, should produce quasi-realistic results. When I talk about realism I literally mean capable of sounding like acoustic timbres we encounter in the real world. The theory was proposed long ago and on paper it looks great. You analyze a signal with a spectrum analyzer (break it down into component sine waves) and then use an algorithm to generate and reproduce those sine waves (amplitude and frequency). As we’ll see in the upcoming videos unfortunately it's a little more complicated than that, and ultimately, not that practical. Therefore when we want realism sampling is far and away the better option. However, that doesn’t mean that the principles of additive synthesis are completely useless to us. We’ll explore a variety of practical applications for additive in the upcoming lessons.

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