external footswitch(s) with FSM 432

Can I use momentary footswitches with this? I have a latching one and it is a PITA because it stays selected for a specific state. so if I map the switch to boost, even though I have the switch to on, when I change to a patch without the boost enabled, I have to hit the footswitch twice to cycle back to off then on. I am hoping that using a momentary switch will remedy this.

I'm a bit confused as to what you mean Grimm. Is this for connection to the FSM432 as "Control 1 and Control 2, expression pedal or additional footswitches"? If that is the case then, to control things like Channel or Boost, they have to be latching types. The sockets are really there for expression pedal use and the idea of using a switch is an additional feature built in with certain drawbacks because of that. All you are doing with devices plugged into those sockets is defining a DC voltage which the circuitry inside interprets as one value in a list of options. For any On/Off switch this means only two levels at the extreme of the range. If the switch is momentary then it will select one end but revert to the other as soon as you release it. The system responds based on the fixed level it sees not on the rising or falling edges of the changeover.

I hope I am right in thinking that your problem is this: You map the external switch to Boost then kick it to On so Boost is engaged. You switch to a patch with the Boost Off. You want to engage the Boost for that same patch. You have to kick the external switch Boost twice to do so.

That is entirely logical (I won't add "Captain" ). The patch setting will take precedence over your switch setting on a patch change. The only alternative is to see the external switch settings as Global and have them always override patch settings for that feature. The switch may still be in the On position but the internal setting in the device's code will say Off. You are having to reset the switch to Off to match it then to On again to make it view that as a change and respond to it. That is unfortunately the way the coding inside works. How would you make the footswitch decide when to work as you want, i.e. to stay with the external switch setting on a patch change when they conflict, and when to work based on what the patch demands, i.e. to ignore the switch and go with the patch? Both are equally valid approaches for some users and they can't both be accommodated. If it was set up as you need it to be, and it could be in the internal programming, there would be people asking why the patch settings are being ignored when they are selected.

It's unfortunate but it is the only way it can be made to work once you see that you have to have latching switches to be able to work alongside continuous expression pedals in order to hold the selections those switches define.