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

#pragma once

#define USB_MAX_POWER_CONSUMPTION 100

#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

#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