so if the player wants to emphasise particular notes this is where bisonic instruents like the anglo concertina do not have the same control, they appear on first hearing to have more bounce, but the bounce is more difficult to control, the gd melodeon or button accordion has more options for cross rowi playing to smooth things out or emphasise certain notes but it still has limitations.
unisonic concertinas can reverse bellows wherever they like, so if the player wants to emphasise in a fashion similiar to scottish or irish fiddlers they can do the emphasis wherever they like in the tune.
   all sytems of concertinas or diatonic acordions can also use finger attack to try and overcome the problem of being particular with emphasis.