Maths is a great choice... see my comment above, for why...

ADSRs are useful if you are using a keyboard... they are what keyboard synthesisers tend to use... but with modular they are comparatively rare... AD and AR are more commonly used... but there's nothing wrong with ADSR... I'm not sure I'd commit 14hp to one, though... especially as it doesn't have cv addressable stages...

Zadar is really, really useful, but I don't think I'd want it as a 1st envelope generator...

"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia

Utility modules are the dull polish that makes the shiny modules actually shine!!!

sound sources < sound modifiers < modulation sources < utilities