I'm here to chime on this issue because the behavior of the Model D makes no sense. I have updated to latest firmware (1.1.1). I have set multi trigger to on. I have set key priority to last. And yet if the filter envelope hasn't finished it won't retrigger with a new note. See this video: https://youtu.be/yu7YVSzLymg As you can see and hear, on the third note the filter envelope is not being retriggered. I suspect because it hasn't reached the end. The behavior is as expected after the longer note, or after two short notes.