How to remove noise in recordings using filter

Devon33

New member
Hi, I am making a project that plays a recording based on button press and records after it is done as long as the button is held. I am running into the issue of the recordings having a far bit of noise. I was wondering if a filter could be used to eliminate this and how to implement it. I have tried to add biquad filtering but I am unsure if I have coded it correctly as it does not produce different results. Thanks in advance for any help.View attachment FEfilter.ino
 
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