The music is an excerpt from ‘I'm 9 Today’ by Múm. Puzzle code : 24x18:2e2b21a32a1a3b1a2b2a233d23a1a2a2b123b1a1a2a3a2a2d23a022c31c1b2a2a3a2b22b2b2a3a3a3b2c211a2a12223a22b2a1a3a23d12e1a2a1b22a11a312b3b3a3c2a3a1a3b1b3210c31g2c22a12c323a2b1a222021b2c2c1a2a11a2c231b32a2b3a2b21322f1b0a1c2b2c3a22a3d3a3a22a1e1212b2b2222a2a22a1g213b3a222c2c12a23a1b3c1a2d1b3a2a0a2a21a2a2a222223b2101a33c31a3a232c3a3a2b
