There is another direction via Midi sounds that has not been discussed or developed: real time parameter changes of patterns. This is being done in the Korg Karma and it seems to me that it could be transferred to arranger patterns. That is, one could use all the existing arranger patterns but allow Karma-like changes in real time on top of the patterns. This would add musically significant "randomness" to arranger styles. Anyone know if such Karma like arranger features are in the works?