# File rbSnack/tkSnackUtil.rb, line 566
  def smooth2
       ff=FormantTemplate.new
       each_index do |i|
          ff<< [ (self[i-1][0]+ self[i][0])/2.0 , (self[i-1][1]+ self[i][1])/2.0 ] if 0==i.modulo(2) 
       end
       ff
  end