Increase/decrease -5dB the volume of every rigs with rig volume parameter acts exactly the same as reducing the master volume by -5dB
I don't see nothing else but 2 needs :
- set volume per rig to match/set some rigs vs the others
- set global volume cause it's too loud or too weak
There's always a "problem" of volume and our settings will never be good....
Reasons why, i think the first and most important thing to have is a volume pedal placed behind the amp block or at the chain's end...
In gigs or at rehearsal, i have my pedal set at 80/85% (to keep a boost if needed) and set the speaker loudness to be audible.
We are doing music, there are power sound variation.... Even if i use the same clean rig for many songs (or in the same song), i know i will have to play with my pedal, in the intro, i'm alone with the singer, and it's a cool move but i have to increase my volume when all the instruments get into....
The other guitarist really boring me with his traditionnal pedal board and no volume pedal. The singers are covered when they sing or we don't hear him when he has to play solos....