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>PLLs are analog. I'm not sure what you mean by "digital control".</div>
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I think what he refers to is that a PLLs often has a frequency divider that is digitally controlled.</div>
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Cheers,</div>
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René<br>
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<b>Von:</b> Synth-diy <synth-diy-bounces@synth-diy.org> im Auftrag von Donald Tillman <don@till.com><br>
<b>Gesendet:</b> Mittwoch, 3. Dezember 2025 02:32<br>
<b>An:</b> cheater cheater <cheater00social@gmail.com><br>
<b>Cc:</b> rburnett@richieburnett.co.uk <rburnett@richieburnett.co.uk>; synth-diy <synth-diy@synth-diy.org><br>
<b>Betreff:</b> Re: [sdiy] DC-1 MHz, through-zero FM, controlled, oscillator without core capacitor</div>
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<div>On Dec 1, 2025, at 8:21 AM, cheater cheater via Synth-diy <synth-diy@synth-diy.org> wrote:</div>
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<div>A PLL would mean completely digital control, wouldn't it?</div>
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<div>PLLs are analog. I'm not sure what you mean by "digital control".</div>
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<div>Do PLLs like that respond well to audio rate modulation?</div>
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PLLs are often used for FM radio demodulation, so yeah.</div>
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<div>Low bass on a Theremin sounds pretty good.<br>
https://www.youtube.com/watch?v=CgPgasgoVbU</div>
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<div>That's an even goofier video!</div>
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<div>Theremins can have a problem with very low notes because the two oscillators can sync up as their frequencies get really close.</div>
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<div>So yeah a flip-flop on the output is reasonable feature.</div>
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<div style="direction: ltr;"> -- Don<br>
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Donald Tillman, Palo Alto, California<br>
https://till.com</div>
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