DEPTH is Modulatable.
Range 0.000 to 1.000
You can change the type of Wave-Shaping by selecting one of the four preset Wave-Shaping algorithms. These range from softer to more aggressive – 1 being the most subtle and 4 the most extreme.
NOTE: Even with the Depth slider set to zero, there will be a certain amount of color added to the sound, so be sure to click the OFF button when Wave-Shaping is not in use.