Have you ever tried singing whilst playing a 3 row melodion in ADG.I have great difficulty in concentrating, but there are many fine melodian players who can do this.John Kirkpatrick is a v. fine example altho' his instrument is chromatic and his L/Hand plays the same note whether the bellows are going "In or Out".My "bar-steward" instrument plays a different notes on ALL L & R buttons with bellows going in to when they move out!! I try and play 2 bars with the bellows in one direction and the following 2 in the opposite way and to this end I have to cross rows...this reduces the necessity for me to change bellows direction on poss. every note...if I were playing a scale.....which would cause me to breathe in and out rapidly...almost "pant" and would really mess up my breathing for singing....try singing whilst inhaling!!