The Mix control lets you balance the amount of dry signal with the amount of wet (distorted) signal. At 50%, there are equal amounts of dry and wet signal. At 0%, the output is all dry and at 100% it is all wet.
The Post Wah control lets you place the Fuzz section before the Wah section, or vice versa.
The Filter control switches the wah filter between LP (lowpass), BP (bandpass), and HP (highpass) modes.
The Mix control lets you balance the amount of dry signal with the amount of wet (wah-processed) signal. At 50%, there are equal amounts of dry and wet signal. At 0%, the output is all dry and at 100% it is all wet
The overall Mix control lets you balance the amount of fuzz-processed signal with the amount of wah-processed signal. At 50%, there are equal amounts of fuzz and wah signal. At 0%, the output is all fuzz, and at 100% it is all wah.