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## Low-pass filter

A **low-pass filter** passes signals that are lower than a specific cutoff frequency and diminishes signals that are higher than the cutoff frequency.

In other words, a low-pass filter passes a signal that has a frequency lower than the cutoff frequency, which holds a certain value specified by the user. All the signals with frequencies more than the cutoff frequency are discarded.


> A low-pass filter removes the highest frequencies from our audio signal.





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## High-pass filter

A **high-pass filter** is the opposite of a low-pass filter. 
It transmits signals with a frequency higher than a certain cutoff frequency and removes signals with a frequency lower than the cutoff frequency.

> A high-pass filter removes the lowest frequencies from our audio signal.




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## A band-pass filter

A **band-pass filter** can be formed by cascading a high-pass filter and a low-pass filter. 

In other words, a band-pass filter is a filter that passes frequencies within a range and rejects frequencies outside that range.

> A band-pass filter removes both the highest and the lowest frequencies from our audio signal.




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## A band-reject filter

A **band-reject filter** is a parallel combination of low-pass and high-pass filters.

In simple words, it rejects frequencies between the lower limit and the higher limit and passes other frequencies. 


What are the different types of audio file filters in Python?

 Low-pass filter A low-pass filter passes signals that are lower than a specific cutoff frequency and diminishes signals that are higher than the cutoff frequency. In other words, a low-pass filter passes a signal that has a frequency lower than the cutoff frequency, which holds a certain value specified by the user. All the signals with frequencies more than the cutoff frequency are discarded.  A low-pass filter removes the highest frequencies from our audio signal.  