| br>There is probably a guitar pedal solution, but I don't know that space very well. Rainger Air Traffic Controller appears to be in the right direction.
One Eurorack vendor that comes to mind is Bastl, since they have some products specifically aimed at interfacing with guitar. Their Bobek kit is aimed at this and has a 6.35 i/o module (Hendrikson) and a nice filter that includes a LPF (Cinnamon). Add a Noise Square to the kit for your white and pink noise, and you are good to go. You could also get those three modules separately and DIY an enclosure for, I'd guess, around half the price of the Bobek.
In Eurorack there are a LOT of noise, LPF, and 6.35 i/o options out there so I'd just look things up on modulargrid if you want to go that route. SSF Quantum Rainbow is another great noise module and there are gobs of LPFs and 6.35 i/o modules. br> br>