Midi Controller / Teensy 3.2 / Not Using All Switches and Pots in Sketch

[nrkorsakov]

Hi!

I am a beginner and trying to program a Teensy 3.2 as a midi controller using a sketch by from Instructables;

Arcade Button MIDI Controller

I am new to this, but uploaded the sketch to my Arduino 3.2 and just wired one pot and one momentary spst in.

The circuit is designed for 12 switches and 5 pots.

For the controller I am building I just want 1 switch and 5 pots.

I uploaded the sketch to the Teensy 3.2, attached only one potentiometer and one momentary SPST switch, and then plugged it in to my DAW.

I get all of these random midi controller cc's (it looked like their the specific midi controller #s that are in the sketch) spewing constant messages into the DAW.

I was thinking maybe it's because I don't have all of the momentary-switches and pots wired into the circuit yet?

How would I test this and get it to work without wiring ALL of the switches and pots?

In the end, I just want 5 pots and one momentary switch.

How would I connect stuff for the end result to be able to make it work when I don't have every switch or pot in the whole circuit?

THANKS !!!!!!!!!!!!!!!

[PieterP]

If you change the number of physical switches and pots, you should also change the number of switches and inputs that are polled in the code.

Alternatively, use a library like Control Surface, then you can simply use:

#include <Control_Surface.h>
 
// Instantiate the MIDI over USB interface to use.
USBMIDI_Interface midi;

// Instantiate a CCButton object
CCButton button {
  5, // Push button between pin 5 and ground
  {0x20, CHANNEL_1}, // controller number and channel
};
 
// Instantiate an array of CCPotentiometer objects
CCPotentiometer potentiometers[] {
  {A0,        // Analog pin connected to potentiometer 1
   0x10},     // Controller number of the first potentiometer
  {A1,        // Analog pin connected to potentiometer 2
   0x11},     // Controller number of the second potentiometer
  {A2, 0x12}, // Etc.
  {A3, 0x13},
  {A4, 0x14},
};
 
void setup() {
  Control_Surface.begin();
}
 
void loop() {
  Control_Surface.loop();
}

See Control Surface: Getting Started for details.

[nrkorsakov]

Hi thank you!

That is terrific, but the Control Surface library I had not seen.

That is way better because I would actually like a few more than 5 faders, but only one or two switches, so this way if I can figure that out I could do that without getting into the "muxing" thing, etc.

I'm going to go look at the Control Surface library tomorrow and try to understand it.

thanks again!