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Signal Processing

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    $\begingroup$ Thanks for the helpful response. I've understood it as follows: Smaller transition width (for a given cutoff frequency) implies a greater roll-off slope and hence higher order in the familiar analog sense, and analogously also in the digital domain. And since order of filter in digital domain is related to the number of taps (= length) of filter, it'll take more processing for a higher order filter. Hence the jitter in my sound. Also, thanks for the workaround. It makes sense to me and I'll try that. $\endgroup$ Commented Sep 28, 2017 at 18:42
  • $\begingroup$ Pretty much. I can't really say what would cause the jitter - you'd have to look at the time series and/or the frequency domain and see exactly what the code is doing. Note - order and filter length are really only related for FIR filters. For IIR you can have one pole that is close to the unit circle and it will have a long impulse response. $\endgroup$ Commented Sep 29, 2017 at 1:13