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Band splitter with ideal phase response and no latency ??

DSP related issues, mathematics, processing and techniques

Re: Band splitter with ideal phase response and no latency ?

Postby martinvicanek » Wed Mar 18, 2020 10:00 am

Optimized linear phase reconstruction 5-band splitters, 3-pole and 4-pole versions.
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SmartSplitter.fsm
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Re: Band splitter with ideal phase response and no latency ?

Postby steph_tsf » Wed Mar 18, 2020 3:33 pm

Thanks, Martin. Such optimization condensate is very impressing. I've just realized that such transient-perfect quasi-synchronous band splitter family may be useful, when coupled to precise compressors-limiters, for maintaining under strict limits, across the whole audio spectrum, the error signal that a Widrow-Hoff LMS Machinery is processing. I've just completed a 64-tap Widrow-Hoff LMS Machinery. No bells and whistles yet. No optimization yet. Just a barebone Widrow-Hoff LMS Machinery, whose code and labels are "textbook" compliant.
See it here : http://www.dsprobotics.com/support/viewtopic.php?f=4&t=38857
It is cloning (identifying) the transfer function of a "plant" consisting in three generalized IIR Biquads in series. I designed the "plant", for resembling a medium speaker driver.

Have a nice day
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Band splitter with ideal phase response (and some latency)

Postby martinvicanek » Sun Mar 22, 2020 8:39 pm

Just for completeness I am posting a five-band splitter with linear phase for each band (and any combination thereof). It does have some (unavoidable) latency in order to make the filters causal. Slope is 24dB/octave, CPU load is not bad.

Have fun!
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LinPhaseBandsplitter.fsm
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