<div dir="ltr"><div>Hi,</div><div dir="ltr"><br></div><div dir="ltr">On Mon, 26 Jun 2023 at 23:29, Neil Johnson <<a href="mailto:neil.johnson71@gmail.com">neil.johnson71@gmail.com</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>On Mon, 26 Jun 2023 at 22:20, Mattias Rickardsson <<a href="mailto:mr@analogue.org" target="_blank">mr@analogue.org</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">Neil Johnson <<a href="mailto:neil.johnson71@gmail.com" target="_blank">neil.johnson71@gmail.com</a>> skrev:<div class="gmail_quote" dir="auto"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>...</div><div class="gmail_quote"><div>Purists will pop up and say that when the modulating signal is a sine wave there is no difference between the two, and that's fine (lets ignore the pi/2 difference between sin and cos, eh?).</div></div></div></blockquote></div><div dir="auto"><br></div><div dir="auto">Surely the amplitudes differ, right? And the modulation depth that follows. Louder treble and weaker bass in a differentiated sine wave. :-)</div></div></blockquote><div><br></div><div>Only because your differentiator is rubbish!</div></div></div></blockquote><div><br></div><div>I'm referring to the f factor here - the derivative of a certain sinewave is lower than the derivative of an equal-amplitude sinewave with higher frequency. Comparing PM and FM with the same wideband modulator signal gives more high-frequent modulation in the PM case. My gut feeling is that this ought to be the less desirable of the two, but still it's used in typical FM synthesis. :-)</div><div><br></div><div>/mr</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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