On Thu, May 6, 2010 at 10:49 AM, Louis Gorenfeld <louis.gorenfeld@xxxxxxxxx> wrote: > Hi Mark, > If you just want to mess with biquads, this is a really good applet > for playing around with them: > http://www.earlevel.com/Digital%20Audio/PoleZero.html .. it'll show > freq. response, but unfortunately won't show impulse response or > phase. But, I've found biquads to be a good starting point for > filters because there is so much information available on their > mathematics and you can create so many different types of filters with > them (btw have you checked out Julius O. Smith's site or > www.dspguide.com?) Fun little link. Thanks. I have been checking out dspguide.com. This one is actually nice from the desigh POV as it gives you actual equations and parameters: http://www-users.cs.york.ac.uk/~fisher/mkfilter/trad.html Go up one level in the URL to check out other filter types, etc. > > There's also Pure Data, which is a free Max/MSP clone. It supplies > both real and complex pole/zero functions, and has an FFT function as > well. There's a learning curve there, but it's pretty flexible. > You'll probably want something to help you solve for gain though if > you end up using Pd. I think Pd seems like way too much for what I want, and might not be very applicable to my end goal. > > Cheers, > Louis > > On Thu, May 6, 2010 at 10:41 AM, Mark Knecht <markknecht@xxxxxxxxx> wrote: >> Hi all, >> I wonder if there are any Open Source tools for learning >> software-oriented DSP, most specifically designing filters? >> >> I'm an EE but haven't done any real math in years. I just want to >> fool around, write some equations, see the results in some sort of >> frequency (filter characteristics) or time (impulse response) plots. >> >> Does anything like that exist? >> >> I started looking at Octave but it's clearly over-kill so I figured >> I'd ask if there was a better platform? >> >> Thanks, >> Mark >> _______________________________________________ >> Linux-audio-user mailing list >> Linux-audio-user@xxxxxxxxxxxxxxxxxxxx >> http://lists.linuxaudio.org/listinfo/linux-audio-user >> > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/listinfo/linux-audio-user > _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
