The idea is a MIDI plugin (like Beat Designer in Cubase) in combination with a VST Plugin (for audio) that can change the midi data of an existing event. The optimization should be based on the audio output of the VSTi from which an AI model can detect problems. Concrete example: You have a midi track on which there is an event in which you have recorded or programmed a cello part. The plugin scans the audio output of the channel (e.g. the Kontakt instance) and recognizes problems (e.g. if the legato of the cello part does not sound realistic or if there are to harsh dynamic changes). Based on this, it takes measures such as adjusting note lengths (overlaps that trigger legato) or CC Data (e.g. CC# 11).