Home : Tune Toys : Pieces-O-MIDI 

Something went wrong - your music was not generated

The output from KeyKit, possibly showing the error, is:
That file is too short to split into  3  pieces!

Try it again with different parameters...
Step 1 Select a MIDI file collection, from which a midi file will be automatically and randomly selected:
Provide the URL of a MIDI file:
Step 2 These parameters control how the file will be processed.
# of pieces: Offset: Multiplier:
Step 3

The algorithm for Pieces-O-MIDI is written in KeyKit, and here's the source code.