On the noise channel, S works like a shape filter. The first digit alters pitch,
the second digit alters the noise modulation. The command is relative, meaning that the pitch/noise modulation values will be added to the currently used values.
The track was done in LSDJ.
As far as how it works, I always find it works if you try and make single drum hits with your mouth (this is also helpful for pulse stuff too). Then slow it down while you do it and think about what you are doing to make that sound. You'll find that you're also filtering by opening and closing your mouth, but, think about how you are pitching the sound vocally. Also think about the envelope you are creating. Then play around and see how it sounds if you start pitching it differently - what happens if you just "sweep" it up? What if you increase the length of time you sweep up before going down again?
Then you can apply this knowledge to your noise channel instrumentation.
