I'm looking for possible building blocks, which provides useful functions for larger racks.
VCOs, filters, effects and so on may be placed around these building blocks ...

I'm on the way to make a bigger studio eurorack, not for life performance.

-- rama1065

then start with a much bigger rack and try to think along the lines set out in my signature

I don't see a lot of what I would call basic building blocks of modular synthesis in the above racks

I see more 'synthesis with modules' as opposed to 'modular synthesis'

"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