There was a typo in the readme, thanks for pointing this out! I add 8 channels (4 mask + 4 masked chorales). The chorales are transformed into 4-dimensional arr

There was a typo in the readme, thanks for pointing this out! I add 8 channels (4 mask + 4 masked chorales). The chorales are transformed into 4-dimensional arrays, each channel representing a part of the piece. I've added some example plots to the readme to illustrate.