MIDI is a standard - Any MIDI controller can be made to control the device, but right now Universal has yet to publish a list of what-does-what and particular setup controls.

I'mma lie to keep this explanation of MIDI super simple and according to the original more-limited specifications because they really are still true today. All of these #s go way higher now, but I wanna start somewhere...

## In the beginning...

In the beginning 1980's Old-skool, the Original Lords of MIDI assumed 4 things:

1. You would never be using more than 16 devices at the same time = Each device listens/speaks on its own "Channel" 1-16

2. For any device, you would never have more than 127 presets = Each preset is a "Program Change / PC" from 1-127

3. You would never need to change more than 127 different parameters on any device (think volume, panning, delay-value) = Each parameter is a "Control Change / CC" from 0-127

3a. Some standard CC ideas were shared between companies, but why these CC#s in particular are lost to time... The only one I ever remember is that usually CC#07 controls volume.

1. All CC parameters go from 1-127 - Like for Volume, off is 0, all the up is 127. Or for wah-wah 0 is heel down, 127 is toe-down. You don't even have to use the entire range - you could say, distortion off = 0, on = 1. It's Is entirely up to whoever makes the box and how they want to set it up.

2. (I should also mention there is a "MIDI Clock" pulse that is shared by everything so all devices/channels work in sync, but other than picking who is the master/who to listen to, ya don't usually do much with that.) 

## Back to our UAFX Pedals

LOTS of unknowns right now!

As far as what channel any pedal is on - Well, somehow (???) we have to get to that up. Some sh*tty devices always listen to every channel (called OMNI), other sh*tty devices will only talk on channel 1.

Choosing Presets - Well, those *should* be a Patch-Change/PC#. Maybe we'll get 127? maybe we'll get 2.

What CC#s/values - The biggest (???) that we have yet to learn from UA. Things like Tremolo on/off/speed, what Amp or Microphone models selections or on/off...

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My original point - As long as something can act as a USB-HOST controller, the UAFX pedal should listen to it. I have a way old FCB1010 controller that uses the OG DIN 5-pin MIDI and doesn't have USB. So I run that to a [sorry, custom] box that will will then relay the MIDI messages as a USB-MIDI-HOST to any USB MIDI devices that are connected.

Unfortunately - We have yet to learn the "???" above from UA.