Low-pass filter
filter that passes signals with a frequency lower than a certain cutoff frequency, and attenuates signals with higher frequencies From Wikipedia, the free encyclopedia
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A low-pass filter is an electronic filter that passes the frequency component of a signal below a certain value (cutoff frequency). The frequency component above that certain value will be suppressed to almost zero. In audio, a low-pass filter will remove or decrease the volume of high pitches, allowing lower pitches - bass - to seem louder.
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