Why does FM only use sine waves?

[SynthWizard]

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Why does FM only use sine waves?

<!-- SC_OFF --><div class="md"><p>What are the disadvantages to using waves with more harmonics?</p> </div><!-- SC_ON --> submitted by <a href="https://www.reddit.com/user/captainofthememeteam"> /u/captainofthememeteam </a> <br/> <span><a href="https://www.reddit.com/r/synthesizers/comments/z9cqzx/why_does_fm_only_use_sine_waves/">[link]</a></span> <span><a href="https://www.reddit.com/r/synthesizers/comments/z9cqzx/why_does_fm_only_use_sine_waves/">[comments]</a></span>