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

If you want to start at the beginning of the series, there's a playlist you can follow: https://www.youtube.com/playlist?list=PLUKhEHilRBxQydqw_kiAdAhegPZMgjVCX There's a simple little technique just waiting to played with on almost every oscillator -- feeding the output back into the FM input. We'll see what happens in this video. There is also a second channel video that extends this one, looking at Triangle & Pulse waves, not just the sine wave here. https://www.youtube.com/watch?v=MHb6nU4EudY