I "invented" this filter in middle school when I was deep into audio processing ... | Hacker News

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		Tade0 on Dec 9, 2024 \| parent \| context \| favorite \| on: Noise Filtering Using €1 Filter (2020) I "invented" this filter in middle school when I was deep into audio processing but didn't have the theoretical foundations yet. Adding a βX_{i-2} term allows for a filter with sharper cutoff, but makes determining the parameters more difficult. The Z-transform is helpful here: https://en.wikipedia.org/wiki/Z-transform

WithinReason on Dec 9, 2024 [–]

Me too, playing with Microsoft Excel as a child, creating series where the next cell depends on the previous one.

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