Auto Wah

AutoMoWah is an envelope-filter/auto-wah that is essentially a copy of the DOD FX-25, with slight modifications by me, such as a Switch to choose between the Band-pass and Low-pass output.

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This circuit uses the LM13700 transconductance IC.

Input signal is split- one going thru a buffer to the LM13700 and the other is amplified and rectified into a dc voltage to provide the signal necessary for the Wah effect.

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Two controls set the wah Range and Sensitivity. You can switch between the BandPass or LoPass output signal, which makes it ideal for Guitar or Bass!

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Circuit is unverified.