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Crossover Design and Trade Offs
Hilmar Lehnert - Watch Now - DSP Online Conference 2024 - Duration: 28:51
Crossovers are heavily used in many aspects of audio signal processing. Crossover design involves a significant amount of trade offs. The presentation describes what these tradeoffs are, presents different architectures (Linkwitz Riley, odd order Butterworth, linear phase FIR, etc) derives their properties and discusses the pros and cons and how they map to typical real world requirements.
Great presentation!
Is there a git repository for the code you showed that is available?
sorry, no. Its a bit of a mess at the moment. I will probably post it after some cleanup
What do you think of using FIR "anti-all pass approximations to correct the phase response?
How would you determine size and coefficients?
That can certainly be done and the number of coefficients required will be on the order of the peak group delay of the branch sum. At this point it becomes a trade off between the FIR correction requirements and just doing a linear phase FIR lowpass in the first place.
Really great presentation Hilmar, right up there with your "Warped Filters" in terms of interesting and useful. Thank you!!