This eliminates keys witches by playing an articulation based on the MIDI channel - in a single instance of the instrument. The new Spitfire Kontakt orchestra instruments have this feature available. It simplifies orchestration as you simply assign the note to the MIDI channel you set for each articulation you have loaded. All articulations that use CC controls respond to MIDI ch1. Easy to move notes and copy/paste phrases without dealing with cumbersome key switches. When using it, it makes key switches feel antiquated and obsolete.