A typical piano has 88 keys spanning just over seven octaves. There are other, smaller keyboards or synthesizers that have fewer keys – most come in increments of 25, 32, 49, 61 or 72 keys.

Meet the world’s first 108-key piano, handcrafted by one of Australia’s last-remaining piano makers. An independent piano maker has produced the first ever nine-octave piano – and it sounds ...