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samGwilliam
07-08-2007, 01:41 PM
Does anyone know where I can learn how to code filters? I've seen a few block diagrams of digital filters (such as http://www.qsl.net/dl4yhf/speclab/filters.htm), which I could easily implement.

The problem is the coefficients. They seem completely arbitrary to me - I wouldn't have a clue about how to translate filter parameters like filter type, cutoff, resonance, etc into coefficients.

Can anyone help?