Hi @amiika, that’s exactly what I am currently after. A first experiment on that matter is contained in this post Improvisations over chord progressions. The basis for automatic harmony selection is contained in a recent post here: Harmonic random walk in major.
Next step is to extend this work to a wider range of jazz harmonies and scales. Missing scales in SPI will not pose a too big problem, as scales can easily be constructed from midi notes and the ring mechanism. I cannot foresee when the next version of the random walk including imporvisations using jazz scales will be ready to show, but the complexity of the matter is quite high. A couple of weeks, I guess …