Mikefule Posted January 9, 2021 Share Posted January 9, 2021 The air pressure generated by the bellows affects the attack and volume of the reeds. Pressure and volume are inversely related: on the push, in order to double the pressure, you must halve the volume of the bellows. On the pull, if you want to double the pressure, you must double the volume of the bellows. (This is approximate as there are other allowances that need to be made.) Thus, if you use the full length available in a set of longer bellows, you have to move the ends further in the same amount of time (i.e. faster!) to achieve the same change in pressure. Therefore, with longer bellows, if you want to play with the same attack and volume as you did with the shorter bellows, you will need to move your hands further and faster. Especially if you are switching from push to pull or vice versa, then I can imagine that the effect is very noticeable. Quote Link to comment Share on other sites More sharing options...
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