It was a bad name, #MIDIFLIP is so much better
Relates to https://www.youtube.com/watch?v=4IAZY7JdSHU
This is a twitter bot which will do an interval inversion based on the interval between the first pitch in a piece of music, i.e. if a pitch was 3 steps higher from the first pitch, it becomes 3 steps lower.
Just tweet @midi_inverter and with a direct link to a midi file
Using #higher will raise the output by an octave and #lower will lower the output by an octave
@midi_inverter http://www.forelise.com/media/for_elise_by_beethoven.mid #lower