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audio filter - usb recorder (What is blue component)

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alpa4ino

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audio blue part.jpg

Hi , this is audio usb recorder.
A blue part was added between the usb and the mic.
After placing this part (blue one ) , the hi noise are not recorded only the low ones.
Can some one tell me what is this blue electronic part , and how it works ?? please.audio blue part.jpg
 

a polyester capacitor for filtering purpose.
 

Thanks for the info , well its may sound stupid but can you tell me a range of values that this capacitor must have so i make my experiment .
 

There will be some markings on the capacitor .From that you can find its value.
or remove and measure with a capacitance meter.
 

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