Understanding FM #3 - Self-modulation, the trick you've been ignoring 

Wow, thanks! Glad you're enjoying it.

couldn't agree more on this :D

@els1f - Be there *and* be square!

@GillamtheGreatest - Man, I tried really hard to get this into a form where it would fit into a single video with a coherent flow to it, but damn, it just goes everywhere. In the end I had to just admit that I was taking an arrow to the knee and go this route. Thanks for sticking it out. (like the arrow sticking out of my knee...)

@modalmixture - You've hit on a question I have spent several hours trying to unwind! This will have to wait for a future video -- but this does give me an idea for something to look at -- but one thing that Chowning does look at is how the appearance of the sidebands is related to Bessel functions, and those are well defined in how they evolve -- it's not just a matter of modulation depth, but also modulating frequency. At certain low values, there just aren't any sidebands. But that's kind of just appealing to the math. Why aren't there sidebands? "Because math." isn't a very compelling answer, but it might be the only real answer in the end. Look for discussion about this in probably episode 5 or 6 :) Thanks!

@@SoundVoltage fascinating. Thanks for your thoughtful responses. I’ve been following along on my OpSix.

@mooseyard - If I am understanding right, I think you're saying the same thing in both cases :) The thing about self-modulation here is that the carrier and modulator are the same thing, so yes, "using it as it's own modulator". But to do that, I am "feeding the FM output back into the carrier as the modulator".

@@SoundVoltage OK, I think I may have gotten confused - you said at the start you were feeding the sine wave output into the linear FM input. I assumed there was a separate modulated output and the sine out would stay a sine. But I guess that’s not the case.

​@@SoundVoltage Sine out is a confusing name for the output in the diagram at 2:03

@jonathanyoung6397 - Well, they kind of are symmetric around the carrier, only the ones on the left (lower sidebands) go down to zero hz and are filtered out, or go to negative frequencies, and wrap around back on top of the positive sidebands. So effectively they 'aren't there', but their effect is still felt.

You're welcome!

@emptycoast420 - Finally! Someone gets it.

@SyntheticFuture - Thanks! It's a big topic, and it took me like a month of trying to finally figure out how to structure it. But at least by then I had a bunch of this written already...

@@SoundVoltage haha yeah. I tried to work it out but all I really accomplished was writing down a giant tree of topics with a lot of question marks on topics where I lacked knowledge. Thanks for taking on this incredible challenge 😄

@analogueghostmusic - "My days of not taking you seriously are certainly coming to a middle." :)

@@SoundVoltage ❤

@forestine_ - Thanks! It would be hard to make my videos without the Mordaxes...Mordacies?

Thanks, I'm glad they help!

@Yeebok - That's officially the new tagline for the channel. :) Wow, thanks, I'm glad you're enjoying it. And yeah, RU-vid seems reticent to put my content in front of more people. I'll just have to keep working at it.

@@SoundVoltage in all honesty mate I learnt more about FM in the second video than anything else I've watched on here. The video it recommended me was only 5 days old but given your content I'm surprised I haven't seen your stuff before. I'm glad I have now and hopefully this burst of interest gets you some decent rewards for your efforts