qmk_firmware/keyboards/planck/keymaps/muzfuz/config.h

#pragma once

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

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

/*
 * 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

// Most tactile encoders have detents every 4 stages
#define ENCODER_RESOLUTION 4