It's always funny to me how working on one PD project results in fruit that might also prove useful.
Currently, working on a broader project, but this part (at least) (I think) is ready for distribution.
Background: I Really hate leaving the side of my guitar (for example to click a mouse or tweak a setting) when I am playing. So designed this mmp app so that I can attach (with funtack, ex.) my handheld to my guitar and control my settings from there or perhaps even as I play. Like so:
[Aside: the broader project also includes (on the front-side of the app) controls driven by the handheld's tilt, as well as, the adc~ pitch, env~, and distance of the pitch from a "center". But that part has to wait (though the code is all inside the mmp_osc2midi_rc.pd patch just disconnected/does not use the cpu).]
SETUP (linux is what I know, so other OSes may work just can't/haven't tested them):
JACK
Pure Data
a2jmidid - JACK MIDI daemon for ALSA MIDI (in the Ubuntu at least repos)
guitarix a/o rakarrack, or other midi-driven effects apps (such as the included set of 30 pd effects(see below))
PIECES:
The mmp_osc2midi_rc.zip (extract(android)/install(ios) to MobMuPlat directory)
The osc2midi_bridge.zip (to be run on the "pd receiver") and includes the osc2midi_bridge.pd, help file, and a set of 30 mmp-ready-(mono) effects (in the ./effs directory) that can be used if PD is to be used as the receiver. (They are standardized to include 3 inlets: left=inlet~, center=[0 $1(, [1 $1(, [2 $1( messages sent to 3 parameters on the effect, and right=[switch~] and 1 outlet~ and a demo guitarix "bank" file called "MIDITEST.gx" (which includes 2 presets/programs and set midi values (0-8) to test. Just add the file to the guitarix config "banks" folder).
Instructions:
- Start Jack;
- In Pure Data, open the osc2midi_bridge-help.pd file; toggle "listen" on; and set MEDIA to "ALSA-MIDI" (the additional pieces are just examples of receiving the midi values);
- In Jack>ALSA: Connect Read:MIDI to Write:PD & Read:PD to Write:Midi;
- From the command line execute "a2j_control start" (no quotes);
- Start (ex.) guitarix;
- In Jack>Midi connect a2j:Pure Data(capture) to (ex) gx_head_amp:midi_in_1.
Note/Alert/etc. For a machine to receive OSC messages the recipient-computer's firewall must (I believe) be turned off.
GUI:
The GUI has 3 pages that look (basically) as follows (with the subsequent 2 pages having only the 3 knobs and 3 buttons).
The buttons trigger text entry boxes which allow you to enter numbers (0-127) representing:
PGM: the number sent to (midi) [pgm]
and
(the buttons beside the knobs) the midi value, i.e [ctrl] (0-127), each knob is to be sent to (all on channel=0). (The resulting number of which are all written to the label to the left.)
For example:
Results in:
You can now to do 1 of 2 things:
Set the mmp-knobs to whatever midi values you have set in guitarix
or
Set the guitarix midi values (mousewheel click on a control) to one of the mmp preset 0-8 midi values.
WOW!!!
That took a helluva a lot of writing (and reading) but I hope you can both see the value and make use of this bit of technology.
As I said before,
I look forward to being able to fine tune my sound ALL while my hands and I are BOTH still at my guitar and not bend over, move, etc. etc. etc. to get the sound I want.
Peace, Love, and Ever-Lasting Good Cheer.
If you made it this far 
, Thanks for Listening.
Sincerely and Optimistically,
Scott
p.s. ask whatever you want regarding setup, how to use, points-of-clarification, etc. I am more than happy to help.
"Out of Love comes Joy"