Hey Hans,
Here's an update of filterview. There are now procs for the following filters:
lowpass
highpass
allpass
bandpass
resonant
peaking
highshelf
lowshelf
I've added some lines to show the phase response (you have to comment out line 135 and uncomment 136 to see it). I also adjust the bandwidth calculations so the handles sit where they should (i.e. -3dB for bandpass/notch/etc., 1/2 power for peaking/shelf).
btw, the frequency axis is log-scaled, though it could probably be improved a little. I sort of took a Pd approach to it by making an mtof proc, so the x-axis gets scaled to linear midi notes and converted to log-frequencies. :-) There might be a simpler way to do it. It also doesn't go all the way down to 0 Hz, because doing that with this approach causes the lowest frequencies to take up too much of the graph. I think Max gets around it by using a more compressed scale below 1-2 Hz.
.mmb
On Thu, Feb 10, 2011 at 12:39 AM, Mike Moser-Booth
<mmoserbooth@gmail.com> wrote:
Sure, I can throw the others together. Now that one is done the rest should fall into place pretty easily. It might take me a couple of days to get to it, though.
.mmb
On Wed, Feb 9, 2011 at 11:47 PM, Hans-Christoph Steiner
<hans@at.or.at> wrote:
That's awesome, thanks! I committed it under your name:
I'd like to implement all of the relevant filters, which algorithms should I use? Or even better, perhaps you want to take a crack at it while I figure out how to display the x/frequency on a log scale :-D
.hc
--
Mike Moser-Booth
mmoserbooth@gmail.com