There’s been a lot of furious comment about this and lots of people seem very impressed. I haven’t had a chance to take a look as yet, but when I do I’ll let you know what I think.
For now, here’s the app’s description from iTunes:
BACH IN A BOX.
FUGUE MACHINE is a tool inspired by composition techniques used in Baroque music and Serialism — e.g. Bach’s canons and fugues, and Schoenberg’s twelve-tone technique. The idea was to design a tool to manipulate a melody’s speed, direction, and pitch, as well as play multiple variations of the melody simultaneously.
As it turned out, the best implementation for this was to reimagine one of the most fundamental building blocks of all music sequencers: the piano roll.
THE PIANO ROLL, REIMAGINED.
FUGUE MACHINE is the world’s first multi-playhead piano roll. Create a musical sequence and play it back with up to four playheads at once — each at various speeds, directions, and pitches. You see the playheads dance over the music sequence, and hear the complex patterns that emerge.
FUGUE MACHINE costs $9.99 (£7.99) on the app store (click below):