qmk_firmware/keyboards/preonic/keymaps/dudeofawesome/config.h

#ifndef CONFIG_USER_H
#define CONFIG_USER_H

#include "../../config.h"
#include "dudeofawesome.h"

#define TAPPING_TOGGLE 2

#ifdef AUDIO_ENABLE
  #define STARTUP_SONG SONG(PLANCK_SOUND)
  // #define STARTUP_SONG SONG(NO_SOUND)

  #define DEFAULT_LAYER_SONGS { SONG(QWERTY_SOUND), \
                                SONG(WORKMAN_SOUND), \
                                SONG(COLEMAK_SOUND), \
                                SONG(DVORAK_SOUND) \
                              }
#endif

#define MUSIC_MASK (keycode != KC_NO)

/*
 * MIDI options
 */

/* enable basic MIDI features:
   - MIDI notes can be sent when in Music mode is on
*/

#define MIDI_BASIC

/* enable advanced MIDI features:
   - MIDI notes can be added to the keymap
   - Octave shift and transpose
   - Virtual sustain, portamento, and modulation wheel
   - etc.
*/
//#define MIDI_ADVANCED

/* override number of MIDI tone keycodes (each octave adds 12 keycodes and allocates 12 bytes) */
//#define MIDI_TONE_KEYCODE_OCTAVES 2

#endif