Bluebulb Projects' The Measure of Things presents:
140 is about one-and-three-fifths times the number of Keys on a Piano
In other words, the count of Keys on a Piano is 0.630 times that amount.
(Moden layout; A
0 to C
7)
Most modern keyboards have 88 keys, comprising seven octaves and an additional major third. A full-size, acoustic piano may have as many as 12,000 separate parts.
