I don`t want radio in my circuit

I have made a wah pedal for my guitar, I use a proximity sensor to change the sound. My problem is I receive fm station. Here is the schema of the sensor to resolve this probleme. what sould I do ? https://www.edaboard.com/viewtopic.php?p=777041#777041

Try making the 22pF cap smaller. You want the the max total capacitance
to roll off at ~25Khz. Or you can try and put a huge Inductor in series.