[sdiy] Filtering for chromatic scale frequencies?

Mike Beauchamp list at mikebeauchamp.com
Thu May 31 07:49:26 CEST 2018

This might be bit of a strange one.. I'm wondering if there's any way to 
filter an audio signal to favour frequencies that are within the 
chromatic scale?

So, sort of like "autotune" - but instead of correctively altering the 
pitch of 'wrong' notes, the filter is just lowering their amplitude 


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