i>
            <li class="nav-item" data-level="3"><a href="#example-8-band-limited-oscillators" class="nav-link">Example 8: Band limited oscillators</a>
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              </ul>
            </li>
              </ul>
            </li>
            <li class="nav-item" data-level="2"><a href="#part-5-subtractive-synthesis" class="nav-link">Part 5: Subtractive synthesis</a>
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            <li class="nav-item" data-level="3"><a href="