I got into Pd (2 or 3 months ago) because I wanted to emulate MIDI on Android. I was annoyed Android does not have built in MIDI support, but now I'm grateful because I'm getting into Pd in it's own right (and my Android projects can make some weird noises).
This patch includes two abstractions. One is "deswitcher4~" a fairly trivial abstraction that allows you to select one of 4 audio signals to pass through. The second abstraction is the point of this. It's the awfully named "vcf_fun~" which allows you to connect an osc~ or phasor~ or whatever as a number signal to the Q inlet on a vcf~. Inlets and arguments are explained in the abstraction.
Anyway, I find it fun. I'm also guessing this is mundane everyday stuff for most of you.