#include <MIDI.h>
#define USBserial Serial
#define MIDIserial Serial1

// Ableton C-2 = C0 = 00, Ableton C2 = C0 = 24; my keyb default range: 36-72
const uint8_t LOWEST_KEY = 36; // 24=C2, 36=C3
const uint8_t HIGHEST_KEY = 72; // 84=C7, 72=C6, 60=C5, 48=C4,

int LedInt = 13;
int PinGate = 2; // digital
int PinCutoff = 3; // PWM, to 30000 in setup
int PinPitch = A14; // DAC, to 30000 in setup

uint16_t gPitchAnalog = 0;

...
void setup() {
  ...
  analogWriteResolution(8); // default to 8bit PWM resolution
  analogWriteFrequency(PinCutoff, 30000);
  ...
}
...