ding.c

float my_sound[][2]       = SONG(ONE_UP_SOUND);

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
    switch (keycode) {
        case KC_ENTER:
            if (record->event.pressed) {
                PLAY_SONG(my_sound);
            }
            break;
    }
    return true;
}