Now these are simmple diagrams. The white lines is the grain of the call as referred to by Swampcollie. The red mark is the actual striker stroke on the surface.
To make a yelp
Is like a letter "J" stroke with your striker
To Purr
Drag you striker is a soft motion.
To cluck it is one quick -brief striker movement
The diagram shows Cutting which is a series of several or more fast clucks.
I always practive to a CD by Lovett Williams - Real Turkeys VI (voices af the real wild turkey)
JW