-11-kisana" class="nav-link">Example 11: Kisana</a>
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              </ul>
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            <li class="nav-item" data-level="2"><a href="#part-6-synthesis-by-frequency-modulation" class="nav-link">Part 6: Synthesis by frequency modulation</a>
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            <li class="nav-item" data-level="3"><a href="#example-1-frequency-modulation" class="nav-link">Example 1: frequency modulat