The effects block presets give you the possibility of having a global block across multiple presets. I actually used that on a gig where I knew I had to go into another guitarist's amp without having tried it first and only had limited time for soundcheck. I built my presets around a single amp block preset so that I only had tweak that single effects preset and it updated across all my presets for the gig. Worked like a charm
Is that really how the Headrush works? That'd be completely new to me (but then, no firsthand experience apart from trying the thing in a shop rather briefly).
I always thought that'd be block presets just allowing you to load a block and then quickly grab your favourite settings.
So how is this handled then? Are these blocks somewhat indexed, so you know you might tweak more than one preset's content simultaneously? And can you kinda convert them to normal blocks only saved within a patch?
With the GT-1000 all block loading "stomp boxes" (which is what Boss calls that functionality) are indexed, so you know you're editing this block in all patches using the same stomp box, and then there's a "write to patch" option which makes the block function in "normal", single patch mode.
While I'm not entirely sure what you mean by "global blocks"
Just exactly what you describe...
I do believe that's what Headrush effects block presets actually is. You can edit that effect's preset and it will effect all the rigs/presets/patches (whatever you want to call them) that use that effects block preset.
As said, this is absolutely new to me. So far I always thought the Axe FX (where it's actually called "Global Blocks") and GT-1000 were the only modelers featuring such a functionality, with the Kemper's "parameter lock" possibly coming somewhat close (not enough experience with that).
Has been the reason for me to ultimately get a GT-1000 because I wanted that functionality (which actually is nothing else but "ok, let's make this work as in an analog setup") badly, because on all those mentioned telephone band jobs I'm very often running into the situation that I really want to "rebalance" a few things.
Is that function available in all HR modelers? Because I'm still considering to get a smaller unit for backpack/gigbag/train/flight gigs and that option alone would be worth to at least look at one of the HR offerings a little closer.