MIDI and Servo library collision?

Projects General Guidance
1

Hello, I'm not much of a programmer and I'm having problems with a project where I plan to control some things by Arduino UNO reading midi and controlling servos (music to mechatronics). If I include <Servo.h> in my project, midi stops working (servo test procedures do work as expected). There's no compiler error, just midi messages like NoteON event don't come thru (just by including servo header and nothing more).

I'm bypassing the midi library (GitHub - FortySevenEffects/arduino_midi_library: MIDI for Arduino) with reading and analyzing serial bytes, but I find that rather tedious. Is there any chance someone experienced could compare the two libraries and identify the culprit?

Cheers!

This is a minimal example where it fails (comment out the servo include and it works):

#include <MIDI.h>
#include <Servo.h>

MIDI_CREATE_DEFAULT_INSTANCE();
#define LED 13

void BlinkLed(byte num) {
  for (byte i = 0; i < num; i++) {
    digitalWrite(LED, HIGH);
    delay(150);
    digitalWrite(LED, LOW);
    delay(150);
  }
}

void handleNoteOn(byte channel, byte pitch, byte velocity) {
  BlinkLed(pitch);   
}

void setup() {
  pinMode(LED, OUTPUT);
  MIDI.begin(MIDI_CHANNEL_OMNI);
  MIDI.setHandleNoteOn(handleNoteOn);
}

void loop() {
  MIDI.read();
}
2

I cannot find any hardware clash so I guess it's a memory problem. The Servo library allocates some memory if included and the midi library isn't programmed with resource-saving in mind so I guess that you're running out of RAM.

3

It was quite a cuckoo cause: I was testing the above script (with and without the Servo include) on some arduino midi shield (which works ok for midi stuff I needed before).

Then I reconstructed the schematics with a 6n138 optocoupler, a diode and two resistors. There, the above script works with the Servo include, all midi messages come through.

I'm totally NOT interested why, though. Too weird for my brain. To publish the symptoms and possible solution should be enough from my part. Have to move on. Thanks!