I realized how to reframe my question. In Zorro, there are Finite Impulse Response (FIR) Filters. I want to find a way to write Infinite Impulse Response (IIR) Filters, or recursive filters. These types rely on their past outputs to calculate current values. Programmatically, I’ve seen this done in EasyLanguage. However, in terms of Lite-C, how would one go about writing a IIR Filter? I know JCL would probably know because this is a DSP question.

Thank you again for any assistance!

Also, thnx Hredot, that was one of the things I tried. I will try it again, maybe I made a mistake.