@ScotteeeRock Hey, I have a Boss GT-8 and used it for many many years and loved it. You
can control the Axe FX with it and use the expression pedal and CTRL pedal, but it's been a while since I've tried it. To be honest, I only tried using the GT-8 as a MIDI controller once when I had the Axe FX for only like a week. I didn't get it to work exactly the way I wanted and was impatient so I didn't put a lot of time and thought into it. If I remember correctly, though, the thing is you'll have to set up the CC numbers in the GT-8 to match the CC# in the Axe FX.
For example, if you want to control the Wah...
Boss GT-8
- Go into the GT-8 MIDI settings and change the EXP Pedal to send MIDI data through CC# 16. CC#16 is the value in the Axe FX for External Controller 1.
- I can't completely recall, but I think there is also a EXP Switch available in the GT-8. If so, assign that to CC#97. CC#97 is the value for the Axe FX's Wah Bypass.
Axe FX
- In the Wah block, assign a modifier on the "Control" parameter. Make the modifier "Expression Pedal 1".
Should be all set after that.
Same goes for the CTRL Pedal. Change the CC# in the GT-8 to match the CC# you want to control in the Axe FX.
I don't think you assign pedals 1 - 4 unfortunately. I remember wanting to use those to bypass effects and stuff, but couldn't find a way to edit their CC values.