I can not cackle worth a darn. But I can cluck and purr.
I just vibrate my tongue on the roof of my mouth. Not the gargling that some say to do.
Like making a motor boat sound, with out the sound. Then I slide my the tip tongue on the
end of the reeds. Throw a cluck n before and or after.
I use the executioner and exec 2. Just order the new deciever.