DSP Module IIR Filtering sample by sample

[daniel]

I had the same problem, Fabian’s hint worked for me (click on the topic to get it better formatted):

ProcessorDuplicator - how to?

Yes your approach looks good except for a single line. You need to dereference the filter state, as each mono filter has a pointer to the state of the ProcessorDuplicator: auto loCoeff = dsp::IIR::Coefficients<float>::makeLowShelf (sampleRate, loFreq, loQ, 0.25); *filter.get<0> ().state = *loCoeff; auto hiCoeff = dsp::IIR::Coefficients<float>::makeHighShelf (sampleRate, hiFreq, hiQ, 0.25); *filter.get<1> ().state = *hiCoeff; In general, what may be confusing is that some filters in the dsp m…