OK, a question for all the clever people who know such stuff.
I picked up my harp upside down and went to pop a 6 overblow. I popped a 4 overblow using exactly the same technique.
How does that work? I thought the idea was that you blow 'downwards' to choke the blow and make the draw vibrate. Same thing with the overdraws. Draw 'up' = overdraw.
Is the downwards blow insignificant and only the choking important?
I recall this post where Dudegizmo offers this perspective on the subject.
'I have created another video where I am trying to help people overblow and this time I am showing that overblowing is not about the angle the air gets into the harp but rather the air density which is caused by the back pressure of the thin passage created in the back of your throat.'
I have tried dudegizmos suggestion of playing the harp normal way up, upside down, held vertically in one direction then held vertically in the other direction and have indeed found that the OB's are equally easy to play without adjusting embouchure. It does feel weird and a little awkward in the vertical position but once prepared blow at this strange angle, the OB's come out just as well.
