Eli5, how do sound equilizers work? If there is only one audio file, how do equilizers differentiate between bass, minds, and things like that and then are able to change them?
In: Technology
The nice thing about filters is that the frequency content of the input doesn’t really matter. Say you have a simple low pass filter (which does what it’s named for – it lets low frequencies pass) with a corner frequency (basically where the filter starts to activate) of 100Hz. When audio is run through this filter, frequencies well below 100Hz will go through more or less unchanged, but frequencies above (especially way above) will be attenuated. On an EQ, this could look like keeping the bass at 0, but mid and treble all the way down.
Useful EQs use better filters with more options for what frequencies you want to start adjusting around in order to tune it up how you want it.
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