Adding to Greg’s reply above:
… Oh, and while i’m at it, the ‘dive’ I am looking for needs to last more than the 2 seconds afforded by the PitchFlex algo, is there another also that might offer this? …
You *could* go with an expression pedal, and control the sweep time manually. I believe that you can plug one into your Barn3 (3rd Aux switch input). It’s not a particularly smooth or easy option. That has as much to do with the ear’s sensitivity to pitch changes, as it does expression pedal resolution & throw travel.
A smaller pitch interval – 2 or 4 semitones – is more controllable than, say, sweeping an octave or two. (You effectively get a finer sweep resolution – for a given pedal throw – over a shorter distance between pitches.) The same can be said for pitch shifting with an expression pedal using any of the appropriate algorithms.
Something to try with your Aux switch: Use a negative SHAPE value, and double your intended pitch destination. For example, if you want to dive down -1oct, set the TOE A/B values down to -2oct. The negative SHAPE will ‘curve’ the pitch shift; slowing it down for the 1st portion of the sweep. Again, it’d be difficult to ‘nail’ the exact -1oct down point. But it will audibly ‘extend’ the 2.00S limits on the GLISS parameters.
Here’s a little more info about the SHAPE parameter: https://www.eventideaudio.com/comment/29495#comment-29495