So in the interest of science, I finally got around to plugging the Katana into the PC to check out Tone Studio tweaking and a quick n nasty Repear recording. The clip above is the stock 'Texas Crunch' tone, untouched by me, with three sample takes on bridge (hot humbucker) the middle and neck (hot single coil). No post processing, just straight from amp USB -> Reaper (The katana as a audio device). What I hear from the recording is about what I'm hearing from the amp.
The Tone Studio tweaking was also cool - the functionality is > x10 with it. One thing I reallllllly liked was that there's a FX mix and a Direct Mix for pretty much every effect. IMO this is essential for Bass FX, albeit a nice to have for guitar.
The other thing I noted was that the FX I tried are hit n miss - the heavier drive's (Metal Zone, Fuzzes, Rat) are not great, I definitely prefer the pedal versions. The lighter ones (Blues Driver, Transparent OD, etc..) are good. Reverb's are bland, Delay's (the SDE3000 aside, which is good) are also a bit bland. I dug the touch wah too but didn't go much deeper into the FX than what I've mentioned. Oh, the EQ options are pretty good and useful!
For me - The Amp sims are pretty good, probably the best part of the katana package - cover the basics of what I'd want (Acoustic, Clean, Crunch, HiGain) and scratch my itch in each respect.
modulator I have been wasting time trying to read up on all this stuff.
My apologies for leading you down the rabbithole! I'm a long time multifx junkie, it's become second nature to me - also gotten to use/try a whole bunch of things so I'm ever curious about how they've evolved.
So I did try and dial in the Katana to be more fun w/o being plugged into the PC for Tone Studio. That'll be a iterative process - but given alllllll the options you've got plugged in and how little you can change when not plugged in - that might be tricky.
So far, I R satisfied with a old, cheap Mk1 Katana.