qmk_firmware/keyboards/preonic/preonic.c

#include "preonic.h"

const uint8_t music_map[MATRIX_ROWS][MATRIX_COLS] = LAYOUT_preonic_grid(
  48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
  36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
  24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
  12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
   0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11
);