People often forget about the way of playing a concertina, of any kind, can be greatly dependant on the touch of the player. I am thinking of not always playing loud, but also more tenderly, or quietly. It is that combination of lessening the pressure on your bellows, along with something else less tangible, with the fingers that can so greatly affect the sound produced. Personally, within my own limitations, I like to play a piece quietly when needed, almost to a mere whisper, as much as reeds will permit; and slowly too, which can take as much care, in my opinion, to do successfully as the quicker, louder, pieces. I even take advantage ( with my Anglo) of the duplicated reeds which have a quieter tone, than their compatriots, and make a gentler, translucent sound more effective.