Yes. I really should do that... I willIf you put the Bass, Mid, Treble, and Gain knobs from the amp block as your Performance Controls, I'd be willing to bet you could get really quick at dialing out what Fletcher is doing to your sound.

Yup. The Loudness switch on old stereos was just a bass boost. Sometimes a treble boost, too. At high volume, it was just obnoxious. But a lot of bros thought it was cool. “Listen to all that bass!”The loud switch AFAIK would just put a fixed boost on bass and treble - bit of a blunt instrument.
It's not just about volume. The size and response of the room you're in makes a huge difference too. There's no real substitute for final tweaking of things at gig level at the venue itself. Try playing an outdoor gig with no walls nearby for reflections. Your carefully crafted tone can disappear into the open air like a fart in the wind. If you try to dial things in there and your next gig is at a small concrete walled basement bar, the results will be drastically different. There's no one step solution that will work for every venue.

Note nobody with a tube amp ever complained about this.
I think the reason why is the usual way to control the volume on both is quite different in character so because of that people find excuses when they would be better off looking at this first.
Try getting your favourite model set up with no fx at reasonable volume.
Now go in to the amp block and turn it down with the authentic volume in the block, same as on the amp.
This in my experience is the most common reason for not having a similar experience to a real amp.
This and my usual complaints about frfr being mostly poor at reproducing the experience of amps.
But everyone is used to that.Tube amps have the opposite problem: they sound anemic at low volumes.
It should be feasible, but maybe efforts are not worth it.That is the reason why an automatic Fletcher Munson correction is not feasible
Agreed, on a tube amp simple settings are used on the fly to adjust the tone per gig. I think, using this same approach with keeping it simple on the axe by adjusting volume and tone controls on the main amp block to achieve the desired tone for that night is the best approach. Folks don’t have hours right before a gig to make things perfect for each night.Note nobody with a tube amp ever complained about this.
I think the reason why is the usual way to control the volume on both is quite different in character so because of that people find excuses when they would be better off looking at this first.
Try getting your favourite model set up with no fx at reasonable volume.
Now go in to the amp block and turn it down with the authentic volume in the block, same as on the amp.
This in my experience is the most common reason for not having a similar experience to a real amp.
This and my usual complaints about frfr being mostly poor at reproducing the experience of amps.
Tube amps have the opposite problem: they sound anemic at low volumes.
But that is precisely the problem. Tube amps sound anemic at low volumes because of F-M.But everyone is used to that.
yeah, gain is the other issue. the added volume always makes it feel like there's more. i like the idea of para eq with high and low shelves mapped to performance controls, maybe amp gain could be another. if you get time at soundcheck it should be easy to get it spot on. i've been doing this so long now, i can dial them in at home and have them sound right at gigs about 80% of the time. i used to have two footswitches mapped to preset level + and - 1db, but i found i didn't need them any more after i figured out how to level match at home. having good monitoring (with a sub) and a some experience is really the key. if you can audition them at gig level, even better, buy i know that's not possible for many people.Final block in my preset is always a para EQ, and I have high pass and low pass mapped to perform knobs. I’ve resigned myself to the fact that my presets at home will always have too much bass, treble, and somehow always too much gain
High and low cut shelves, in the performance pages, is a great idea! I'll give that a go.yeah, gain is the other issue. the added volume always makes it feel like there's more. i like the idea of para eq with high and low shelves mapped to performance controls, maybe amp gain could be another. if you get time at soundcheck it should be easy to get it spot on. i've been doing this so long now, i can dial them in at home and have them sound right at gigs about 80% of the time. i used to have two footswitches mapped to preset level + and - 1db, but i found i didn't need them any more after i figured out how to level match at home. having good monitoring (with a sub) and a some experience is really the key. if you can audition them at gig level, even better, buy i know that's not possible for many people.
I have one stripped down preset with a favorite amp and cab that has the global Out 1 and 2 PEQ high and low frequency points in the Performance controls so I can adjust the shelf points. I use it to set up the overall sound of the modeler before sound check.i like the idea of para eq with high and low shelves mapped to performance controls, maybe amp gain could be another.
I totally agree with this. You should always make a patch at the volume you intend to use it at.But that is precisely the problem. Tube amps sound anemic at low volumes because of F-M.
People dial in modelers at low volumes and (usually unwittingly) compensate for F-M. Then when they turn up at a gig the lows are boomy and the highs are piercing.
Tube amps are voiced for gig volumes. Therefore it is logical to dial in your presets at gig volume.