After reading Lee Brimelow’s post about Adjusting audio pitch in Flash Player 10, I’ve thinked about a real pitch shifting solution (adjusting pitch without change of duration). Then I found a great algorithm here: http://www.dspdimension.com/admin/pitch-shifting-using-the-ft/ and its C# port here http://sites.google.com/site/mikescoderama/pitch-shifting I’ve ported the code to AS3 then heavily op