Currently if we turn on the acoustic feedback option when editing MIDI we only get to hear one note at a time - the first note under the selection rectangle.
I know if we hold down the CMD key while “touching” a note Cubase will play back all the notes that are vertically under the top note (ie a chord if present ) but as well as this it would be much much more intuitive to simply have the option to have acoustic feedback for ALL the MIDI notes enclosed by the select rectangle.