Combine FIR filters in parallel

[idotta]

This might be off-topic, but can you please confirm if, for having the same effect of applying two different filters, I just have to sum the coefficients in the taps? For example:

univector<fbase> tapsNotch(NumTaps);
univector<fbase> tapsBP(NumTaps);
fir_bandstop(tapsNotch, fn1, fn2, window, true);
fir_bandpass(tapsBP,  fbp1, fbp2, window, true);
filter_fir<fbase, fbase> parallelFilter(tapsNotch + tapsBP); // just a simplification

[dancazarin]

Yes, applying a filter that is the sum of coefficients of two filters is the same as applying two filters in parallel (equaliser-like). For filters in series you would need a convolution of two coefficient vectors.

[idotta]

Wow, thanks for the fast and clarifying response!