On Mon, Mar 18, 2013 at 11:45 PM, Fons Adriaensen <[email protected]>wrote:
> A critically damped > second order lowpass with a rise time of 30 ms or so will eliminate all > audible artefacts. It's very low on CPU and you only need to run it while > the gain is changing. > Although I understand the words & their meaning, I have no idea how to start implementing such a filter. I've found a 1st order algorithm on musicdsp: http://www.musicdsp.org/showone.php?id=257 Since its second order I understand it needs the previous 2 outputs. Critically dampened implies that the "factor" of influence of the previous samples is very close to 1 ( 'a' in the algorithm linked ) How is the "rise time" determined here? Noobie questions :) -Harry
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