[Harp-L] The Reason that Overbends Work

["Harmonicology [Neil Ashby]" <harmonicology@xxxxxxxxxxxx>]

My theory pertaining to the overbend note being naturally higher is as follows: Use for example the draw reed and to cause the closing of the draw reed then the user is lowering the air pressure on the side of the reed-plate away from the rivet; the result is that the reed is actually pushed into the slot via the higher air pressure which is evenly spread across the side of the reed having the rivet; in the case of the overblow on the same reed then the air-flow is focused at the tip of the reed at the point that the reed is recessed into the slot and thus the air-pressure is focused into some small wedge-shape between the reed-tip and the slot; because the air-pressure is focused at that small area then the reed vibrates as though it would be some shorter reed.

/Neil Ashby II (" https://www.facebook.com/profile.php?id=100004575466934 ")