Can someone explain to a Frac-curious newb, does the FM3 have preset spillover? And is there any weird limitations to it? Gapless + preset spillover would be pretty game changing.
The important take-away from
@unix-guy 's post is that no, it doesn't in the strictest sense. But, whether it behaves as if it does depends on exactly what you're changing.
Neither more complete spillover nor gapless switching matter
to me.
But, that's because I play in kind of an old-school way with fancy new tools. I only use one amp (one channel, one block) and control the amount of distortion mostly with the guitar's volume controls. If it had a second amp block, I'd at least consider running 2 amps in parallel, but it's not actually that big of a deal. I don't use reverb because I hate it, which also means I don't have to worry about reverb tails or spillover or channel-switching behavior, and I save ~20% of the DSP to use for other things. I do use a delay, but it's always on and never changes....so I don't have to worry about its tails because they're always there. The modulations, boosts, and other things that I use turn on/off in a soft-enough way that if there is a gap or any other weirdness, I can't hear them.
My kitchen sink preset (the only one I use) is one amp, one cab, pre- and post-amp boosts tied together, an always-on delay, volume and wah auto-engage with expression pedals, and 3 modulations that never overlap. The switching is incredibly easy. The only even remotely more complex thing I even really consider is that the sound with a Strat could potentially be a little better with a different amp, a different boost before the amp, and a different approach to the volume knob (compared to my other guitars). But, that change a) would still fit in the DSP allotment and b) doesn't need to be gapless in any way because it would only happen when I change guitars and have the thing muted anyway (and the mute happens before the delay, so I'd still get its tails).
So,
for me, it's a non-issue. That may or may not be the same for you depending on what you want to do with it.
I don't have anything against people who go whole-hog on effects and changing sounds and complex switching and what not - David Gilmore would
not be the same without "8 million pedals"....and there are a bajillion other examples like that. But, my favorite guitarists all have pretty simple rigs (or, at least, I like them better when they play pretty simple rigs).
If there's a shortcoming, for my use, of the FM3...it's that you only have 2 IR slots instead of 4. And I do like both room mic IRs and mixing IRs from not-quite-the-same speakers/cabs. But, I'm pretty sure I can solve that problem by combining IRs in Cab-Lab....I just need to get around to doing it.