qmk_firmware/keyboards/planck/keymaps/lja83/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


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