Crumbs, I’ll try! In all honesty though, if you don’t know much about FM, you’re almost certainly better off finding a nice FM synthesis tutorial you get along with, there’s loads on the interwebs!
The basic principle is that you modulate the frequency of sound you can hear with another oscillator! Think vibrato but at higher resolutions. The interactions of just two oscillators like this can yield an awful lot of timbres, and because of, erm, weird stuff I don’t fully understand myself, this can often create very similar effects that you might find with a filter! I much prefer this form of sound sculpting as it generally offers much greater flexibility than simply using a filter! In reality it’s nice to use both, but it’s the basic principles we’re thinking about for the moment.
The mixing of signals like this also creates harmonics, so you can suddenly end up with a very low tone even though you’re increasing the frequency of a modulator. It’s really weird when you first hear it, and quite magical - I’ll warn you - it’s quite addictive!
Anyway, the patch is made up of 6 operators plus the X operator.
There are three mixer channels each with a carrier and modulator pair, each pair uses two oscillators. There are four waveforms an odd version of a Sine second harmonic (it’s not quite right, but fairly close) on channel 1 - the modulator is set much higher in frequency, then there’s a classic Sine for the carrier on channels 2 and 3 with a rough approximation of the third harmonic for the carriers. The difference between the two is simply the frequency at which they operate and how much of the signal is applied.
Critically important is that each operator has an envelope. This is so that you can mix the signals over time. One carrier will sound, then it’s modulator kicks in at the same time as the second carrier starts to sound so you get the swell and modulation happening around about the same time in the sound progression.
Perhaps a nice way to explore this patch is to mute each of the mixers and just listen to each in turn. As you switch each one back on you should hear how the sounds interact. For example, the filtered noise from the X operator comes in really quite late, there is a delay after the input trigger just before the envelope so it doesn’t start to open up until the body of the sound is well under way.
Finally there is an EQ and a Ladder Filter to shape the sound before it finally hits what is effectively the sound Amp envelope!
My advice is to just explore, as you make adjustments to the carrier and modulator frequencies you will hear the effect it has. Soloing each carrier while you do this is helpful!
As for modulation sources, I’ll leave that to you as I didn’t really make this patch with that in mind
Feel free to ask more questions, or correct me if I have anything wrong