Adding Sinusoids at Different Frequencies

Adding sinusoids of the same frequency produces another sinusoid at that frequency (with possibly different amplitude and/or phase).

Figure 1: Adding 2 sinusoids at different frequencies.

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Adding sinusoids with different frequencies results in a signal that is no longer sinusoidal. But is it periodic?

**Figure 1:** Adding 2 sinusoids at different frequencies.
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``Music 171: Additive Synthesis'' by Tamara Smyth, Department of Music, University of California, San Diego (UCSD).