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IIR filter design libray

Started by CoCo January 19, 2005
robert bristow-johnson wrote:
> in article wlCZd.36050$5T6.15802@bignews4.bellsouth.net, Clay S.
Turner at
> Physics@Bellsouth.net wrote on 03/15/2005 09:33: > > >>> So Spring has sprung here. > >> > >> they're talking about it here. SAP RUNS SOON!!! mmmmmmmn! > >> > >> but it sure looks like winter in Vermont. > >> > > > > Your Spring will come soon enough. And enjoy that maple syrup. It
is as
> > expensive as gold down here. While you are lamenting your brutal
northern
> > winters, just think about our 100 degree F days with 100% humidity
during
> > the summer. Plus there are all of the insects you could ever want.
Flying
> > Cockroaches are fun. They hang out by the porch light and when you
go
> > through the doorway at night, they fly over to your back so you
bring them
> > into the house.
> > well, Clay, i have to admit to being a little bit of a northern
bigot.
> partly because of some of the sociology of the south (which is > multidimensional - race, religion, education, politics, etc. - i'm a
big
> blue stater living in a "big" blue state), partly that i *do* like
having
> four seasons, partly that i *do* like only to have to run my A/C
maybe twice
> or three times a year (once in a while, even we get dog days in the
summer).
> anyway, because i live by woods by the lake (Champlain), we get some
nasty
> mosquitoes here, too. in the spring, there is about a two week
period when
> it's warm enough to lie in the hammock out back before them nasty-ass > mosquitoes start happenin'. then i have to bring the hammock in,
because if
> i don't just cover myself with DEET, they will carry me away.
fortunately,
> no cockroaches. lot'sa microscopic ants. > > -- > > r b-j rbj@audioimagination.com > > "Imagination is more important than knowledge."
Hello Robert, I'm not quite sure how my comment sparked off a debate that is treading along a slippery slope. Certainly the South has a colorful past, but then again the whole country has a colorful past. And many of the past deeds are ugly ones. One of the ugliest from Georgia is when General Winfield Scott marched the Cherokee from Georgia to Oklahoma. Needles to say many of them did not survive the march or the ensuing winters in the midwest. This march was motivated by simple greed. Gold was discovered in the North Georgia mountains (around 1820) and the politicians decided to move the indians. Georgia's legacy in this regard is its current lack of indian reservations. I've been fortunate enough to not only to have travelled almost all of the US, but also to other countries and continents. I just accept the histories of the places as they are. I certainly can't change them. I imagine your comment about being a "northern bigot" really applies to your liking where you live and all that makes it up. IIRC you haven't visited the South during your adult life. You ought to try it before condemming it. After all, many northerners like it enough to move to the South. A huge portion of the Atlanta metro population came from north of the Mason-Dixon line. A big part of my liking the South is simple. It is where I've grown up, and it is what I know best. But there are certainly other areas I like a lot and others I don't care much for. But I reserve judgment on a places I haven't been. Clay p.s. One thing I do have from Vermont is a wave file of Howard Dean's famous scream. I've set up my computer so every time I have a compile error, I hear Dean scream.
in article 1110931765.694207.270580@o13g2000cwo.googlegroups.com, Clay at
physics@bellsouth.net wrote on 03/15/2005 19:09:

> I imagine your comment about being a "northern bigot" really applies to > your liking where you live and all that makes it up. IIRC you haven't > visited the South during your adult life.
other than suburban DC in Virginia and one trip to Austin in 1990, that's about right.
> You ought to try it before condemming it.
i am not condemning the South. i am confessing to being a "northern bigot". i do know some folks from the south. not all are bible thumping religious hypocrites (but some are). not all are god & country, nuke the enemy til they glow, militarists (but a couple are). not all are fat-ass Wal*mart materialists (but some are). and i can find folks like that even here in Vermont. but there aren't too many other states where about 15% of the voting population thinks it might be a good thing to secede from the U.S. (see http://vermontcanada.org/ ). some in Maine might want to do that, too. a clear and great majority in this state is becoming more and more ashamed of what the slim majority is supporting (the likes of W and Karl Rove and Tom Delay, etc.) and the south is reveling in it. much to the detriment of the poor IN THE SOUTH, even though enough of the poor were co-opted by the republicans (because of the so-called "morality" issues) or stayed home from the polls. it's a damn shame, it isn't just in the south, but the south is epitomizing it.
> After all, many northerners like it enough to move to the South.
oh, i know that. here in the east, half of NYC and NJ go to Florida, where i lived in the midwest, it seemed like they all moved to Phoenix.
> > A big part of my liking the South is simple. It is where I've grown up,
i grew up in North Dakota. nice folks but it's too conservative (in some similar and some different ways as dixieland) there too. it's a good state to be from.
> and it is what I know best. But there are certainly other areas I like > a lot and others I don't care much for. But I reserve judgment on a > places I haven't been.
i dunno. never been to China or Iran or Saudi Arabia or, best yet North Korea, either, but i have made some moral judgements about some of the social conditions there.
> One thing I do have from Vermont is a wave file of Howard Dean's > famous scream. I've set up my computer so every time I have a compile > error, I hear Dean scream.
if there is any state that should be credited as the source of that, it should be Iowa (folks a lot like North Dakota, but they grow more corn). like ND, it's amazing how easily they can be duped, too. i used to have more respect for Iowans. you know the whole scream story was taken totally out of context, distorted, and hyped by the media. kinda like the bogus Martha Stewart cover on Newsweek. -- r b-j rbj@audioimagination.com "Imagination is more important than knowledge."
robert bristow-johnson wrote:

   ...

> you know the whole scream story was taken totally out of context, distorted, > and hyped by the media. kinda like the bogus Martha Stewart cover on > Newsweek.
For the record: The room that scream was loosed in was so noisy that people couldn't understand the person next to them unless they leaned together and shouted. Dean was wearing a noise-canceling mike for the benefit of the press; what it picked up was not what the crowd heard. What the crowd did hear was entirely appropriate to the occasion and not much above the noise. For another example of distorted "reporting", see http://www.wtv-zone.com/pjs/birds/wildbirds/head_shake.jpg. Note the relative apparent speeds of the birds head and the falling raindrops. Jerry -- Engineering is the art of making what you want from things you can get. �����������������������������������������������������������������������
Talk to these guys. They have a flexible toolkit for filter development
called signal base, they also did some custom development and integration.
Good stuff.

www.eminentmicro.com


>CoCo wrote: >> Many thanks to all of you. Your proposals were useful. >> >> Just to make things clearer, what I'm looking for is a software >> library that can be called from code of my own. Indeed, in my >> application, filters need to be design dynamically to meet user >> requirements. >> Stand alone software that can be used to design filters (such as >> Matlab does for example) is not a suitable solution for me. > >Along the same lines -- does anyone know where to find >algorithms for numerically transforming LP IIR prototypes >into highpass, bandpass and bandstop filters? > >I don't want packages that do the job for me, I want to >be able write my own package. > >Rune > >
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