@whale-av
Hi David
I got this from the developer to connect mute to arduino.
"In order to add state controled with the arduino, you need to go to the "Connect" section.
In it there is serveral patches call "connect_smth". In it, there is a patch call "extra/midiLearn".
Use it creating an object called "extra/midiLearn nameOfcontrol" , where 'nameOfControl' is an unique id and also the file name associated in the "preset folder". Trough this object, you can control puredata with an arduino in, midi input or keyboard input. Click on the red toogle to activate learning, a window appear, then press the arduino or midi input to save the input.
At this time, midiLearn is working but is linked to nothing. I used "extra/sv" patch for connecting an unique parameter trough different location. You can use it in the same way than "extra/sv $1_$2_looper_volume" that control the volume. "