James W. Morris wrote: >>resonant filters use recursion; the algorithm sometimes is coded as >>'take this input sample and give me an output sample' for readability >>but is easily adapted to arrays.W > >I think that maybe wcnt does both, all the modules process one sample at a >time, and the filters >add one sample to the array every time after processing x samples in filter >array to get average for the one output sampleM
whatever you need to do to get the job done .. but it's usually better to unify. >>the maths behind them are intricate >>(to me at least), D > >likewise; I had a look at harmony central (fairly helpful) which concreted >realisation that I definately had not got any graspA of resonance in my >filters. I looked in eq cookbook, there were bits and pieces which I had no >more than vague notions of. the cookbook is a bitch to read without the background. i guess it's meant to serve as a quick lookup sheet for people who know the stuff but can't remember the exact numbers. if you're looking for bi-quads, those in ecasound seem to follow the cookbook iirc. >>you'll find code exampleHs for the >>algorithm and the compuAtation of the recursion coefficients in almost >>every major audio synthesis/processing package or at musicdsp.org . > >hmmm, I keep putting off loRoking at other peoples code, it's all greek to >me. that's not good, if i may say so. use the source, luke ... you know that drill. there's truth to it. read it, dig it, make it yours. >I've not had much chance to uDse ladspa. I've compiled glame to use it's >filter network, but there seems to be inputs and outputs Olacking, many are >mono, I can't read a stereo file, through a reverb and out to another stereo >Tfile, or from a stereo input on soundcard, through fx, to file, so I've >given up on glame (again), plus I don't like how it wont delete the deleted >things. why not implement ladspa support in your application? it's quite simple to do, and opens a world of sound manipulation. >no idea what this means: above fs/4 IIRC -- not too worried about it >either. 1/4 sampling rate, or 11 kHz in a 44 kHz system. i'm not worried about it either since i never run the svf even near that high a cutoff frequency. >Well, I guess I'll try and learn from otheTrs code at long last, and nip on >over to musicdsp.org. yes! do so. :) tim
