Top 2 in Top 10 most difficult musical instruments in the world.
Unlike most contemporary musical instruments, the organ is named after the place where it is usually performed: the church. Roughly speaking, this instrument produces sound based on the compression of air. It has a very diverse set of sounds according to the "tubes" that produce sounds of different tones, timbres, and volumes. And of course, mastering this instrument, that is, mastering the use of pipes to create music, is not easy.