[Harp-L] Question about doing overblow

[Chen John <killkli@xxxxxxxxxxxx>]

I'm practicing overblow recently.
I got the doing tips from http://www.tenhole.com
I was somehow able to choke the blowing reed, but the
draw 
reed just dont response, even if I use my finger to
force the blow reed stop and blowing all air through
the draw reed......
So I'm thinking whether there is anything wrong with
my techs or my harp need some change?
Thank anyone who answer me question ^_^ 

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