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

 /* Copyright 2020 Stephen Bush <muppetjones>
  * 
  * This program is free software: you can redistribute it and/or modify 
  * it under the terms of the GNU General Public License as published by 
  * the Free Software Foundation, either version 2 of the License, or 
  * (at your option) any later version. 
  * 
  * This program is distributed in the hope that it will be useful, 
  * but WITHOUT ANY WARRANTY; without even the implied warranty of 
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
  * GNU General Public License for more details. 
  */
#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

/*
 * Other options
 */

// Enable lighting layers
#define RGBLIGHT_LAYERS
#define RGBLIGHT_SLEEP

// Change "hold" time (default is 200 ms)
#define TAPPING_TERM 200

// Enable rapid switch from tap to hold, disables double tap hold auto-repeat.
#define QUICK_TAP_TERM 0