Hi Robert,

You're in luck - that's the direct-form-1 biquad which is already in filter.lib under the name tf21. I suggest making a small Faust test program, display the block diagram using faust2firefox (or the online compiler), note the coefficient label mapping, and see how to introduce 1/C0 if you really need it (normally C0, aka A0, is always 1).

- Julius

At 07:01 PM 9/21/2014, Robert Purdam wrote:
Hi all,Â

I have a specific task that i need to write some dsp code for.

From the attached diagram I need to be able to code the system for Hc(z).

Any previous code I have written myself in FAUST has been heavily reliant on calling filter objects from the library.

I wouldn't usually ask for help for an individual task like this on a mailing list, but deadlines are coming up and I'm a tad desperate.

Thanks!
Rob

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Julius O. Smith III <[email protected]>
Professor of Music and, by courtesy, Electrical Engineering
CCRMA, Stanford University
http://ccrma.stanford.edu/~jos/  
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