10+1pcs CD74HC4067 multiplexers about midi_controller

[tttapa]

Note that your code has several errors:

• Your multiplexers have only 4 address pins, so use multiple AnalogMultiplex objects.
• Use Digital objects for buttons, not Analog.
• You can't use the same pins for rotary encoders.

#include <MIDI_Controller.h>

const int speedMultiply = 1;

//BUTTONS
AnalogMultiplex multiplexers[] = {
  {A0, {10, 11, 12, 13}},
  {A1, {10, 11, 12, 13}},
  {A2, {10, 11, 12, 13}},
  // ...
};

Digital buttons[] = {
  { multiplexers[0].pin(0), 0x1, 1 },
  { multiplexers[0].pin(1), 0x2, 1 },
  { multiplexers[0].pin(2), 0x3, 1 },
  // ...
  { multiplexers[1].pin(0), 0x11, 1 },
  { multiplexers[1].pin(1), 0x12, 1 },
  // ...
  { multiplexers[2].pin(0), 0x21, 1 },
  // ...
};
//FADERS
AnalogMultiplex multiplexerF(A3, {10, 11, 12, 13} );
Analog potentiometersF[] = {
  { multiplexerF.pin(0), 0x1, 3 },
  { multiplexerF.pin(1), 0x2, 3 },
  { multiplexerF.pin(3), 0x4, 3 },
  { multiplexerF.pin(4), 0x5, 3 },
  { multiplexerF.pin(5), 0x6, 3 },
  { multiplexerF.pin(6), 0x7, 3 },
  { multiplexerF.pin(7), 0x8, 3 },
  { multiplexerF.pin(8), 0x9, 3 },
  { multiplexerF.pin(9), 0xA, 3 },
  { multiplexerF.pin(10), 0xB, 3 },
  { multiplexerF.pin(11), 0xC, 3 },
  { multiplexerF.pin(12), 0xD, 3 },
  { multiplexerF.pin(13), 0xE, 3 },
  { multiplexerF.pin(14), 0xF, 3 },
  { multiplexerF.pin(15), 0x10, 3 },
};

//ENCODERS
RotaryEncoder enc0 = {0, 1, 0x1, 4, speedMultiply, NORMAL_ENCODER, TWOS_COMPLEMENT};
RotaryEncoder enc1 = {2, 3, 0x2, 4, speedMultiply, NORMAL_ENCODER, TWOS_COMPLEMENT};
// ...

void setup() {}
void loop() {
  MIDI_Controller.refresh();
}

[tttapa]

An advantage of the MIDI Controller library is that it's easy to use and very flexible. This comes at a cost, of course: it uses more memory.

You can either write your own code from scratch, or you could use a board that has more RAM, like a Teensy.

[userdsp]

I love teensy 3.6 <3

Archiving built core (caching) in: C:\Users*\AppData\Local\Temp\arduino_cache_336804\core\core_teensy_avr_teensy36_usb_serialmidi,speed_180,opt_o2std,keys_en-us_4939f5412a75a8560acb0f9e98268f02.a
Opening Teensy Loader...

Sketch uses 34528 bytes (3%) of program storage space. Maximum is 1048576 bytes.
Global variables use 15764 bytes (6%) of dynamic memory, leaving 246380 bytes for local variables. Maximum is 262144 bytes.

[mkothencz]

Thanks for the comments.
I decided to buy a Tennsy 3.5. With Tennsy I don't have to use double-level multiplexer system, because it has lot of input pins.