Iāve been gigging with Cantabile for years and have faced the same question with my amp VSTs. My experience is that using linked racks for the amps is a huge benefit, and definitely lowers the CPU hit quite a bit because youāre only having one instance of the VST. Not using linked means you have multiple instances. This is crucial.
I now have one linked rack for each amp vstā¦ 1 for S-Gear, 1 for Neural DSP Cory Wong, 1 for TH-U, etc. Individual racks use negligible CPU resources, itās the plugins that use more resources. And having individual racks is easier to organize/program for me.
Each rack has numerous rack states with various tones. I set each toneās volume and ensure that EQ falls within my personal parameters (i.e. HP EQ at 100Hz, LP at 5K or so, to mimic speaker cab), and then lock it so any changes wonāt save unless you intentionally unlock it first. So theyāre all ānormalizedā to the same volume and are gig-ready. Very important for live work, and easier to program new songsā¦ just grab the rack states you want, make some song states and youāre done.
However, and this is key, you have the option to use Exported State saved at song level, which simply means that you can take a rack state thatās close, tweak it, and itās saved in the Song State, not the rack state (unless you manually save the rack state too). Thatās essentially what youāre doing with un-linked racks. Click once on a rack, at the top left select āStatesā. Hereās Exported State checked for the Rack:
And here, inside that rack, you can determine if the pluginās snapshot/āEntire Bankā is saved only in the rack state, or also at the Song State. This is currently set for both:
The check on the left means Song State will take precedence over Rack state. (When both are checked you just need to verify, once in a while I get some odd behavior from certain plugins.)
However, thereās also a philosophical and workflow issue here, and thatās up to personal taste. Like you, because Cantabile offers such flexibility, I would try to nail the tone for each song and song part as perfectly as possible. And I had over 100 tones. But keeping them all normalized was a PITA, and endless tweaking was counter-productive. But now Iāve been trimming it down to about 20 tones. And my soundguy and I spent a lot of time tweaking EQ, drive, stereo separation, and effects for each one. That focus helped a lot, and each one sits perfectly in the mix now. Plus it makes the soundguyās job easier, and our overall sound is better for it. However, sometimes on a new song, Iāll take one of those 20, and make a minor change, like adding reverb or whatever. Plus, Iām spending less time on tones and more time on playing. But hey, as I said, the answer will be different for everyone.
Hope this helps! Enjoy Cantabile, itās incredibly powerful.
Tom