[music-dsp] re: band pass filters

Dave Gamble signalzerodb at yahoo.co.uk
Fri Apr 12 20:02:28 EDT 2002


Hi,

> Maybe there's some grad student (or advisor thereof)
> on this list 
> who is in need of a worthy project? Creating a
> filter design 
> which allows adjustable slope at a given number of
> poles would be 
> a useful contribution to the world :-)
> 
> Cheers,
> 
Done it.

I'm just writing my dissertation now.

Realtime design of arbitrary filter response
specifications designed with bezier curves...
Realtime optimisation using BFGS optimisation algo...
It's implemented using a few techniques for the
project....

http://www.dcs.warwick.ac.uk/~csuox/
It's finished now, but I came up with a better
recursion a while after I finished coding..

It's quite cool to use... :)

It seems to give the same results as a kaiser-windowed
2048 point FIR, to be fair, but it's still kinda
fun... And it just sounds more.... "organic" :)

Dave.

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