Extreme tempo manipulation
Original vs. altered Hatto versions
Extreme speed-up example
Here is a direct comparison between the original Ian Hobson recording of the Chopin/Godowsky Etude No. 27 (after Op. 25 No. 2) and the accelerated Hatto version, which is sped up by just over 20%.
Ian Hobson original
Hatto version (accelerated)
Extreme slow-down example
Here is a direct comparison between the original Paolo Giacometti opening of the Schumann Piano Concerto in A minor, Op. 54 and the Hatto version, which is slowed down by just over 33%.